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Background. Chorioamnionitis (CAM) may accelerate lung maturation in fetuses. It is possible that CAM prevents infant death after live birth.Methods. A retrospective study of live-born singletons at

We report a fetus with a giant neck hemangioma which was examined by MRI in utero. The initial diagnosis was made by ultrasonography. The sonolucent aspect of the mass, together with the presence of pulsating Doppler flow signals, was highly suggestive of a fetal hemangioma. In late pregnancy, fetal MRI revealed the location, size and characteristics of the neck tumor. Following prenatal corticosteroid treatment and premature delivery of the pregnancy due to fetal cardiac failure, the newborn received angiography and coil embolization of the tumor vessels. Despite vigorous treatments, the newborn died 12 h after birth. Evaluation of a fetal neck hemangioma by MRI is recommended late in pregnancy for precise information on the tumor and adjacent organs since the image is valuable for planning optimal perinatal treatment.

BACKGROUND The effects of discrepancies in the birth weight and hemoglobin concentration ([Hb]) at the birth on infant outcome have not been fully investigated in monochorionic (MC) and dichorionic (DC) twins. METHODS A retrospective study of 95 twin pregnancies. All 190 neonates (68 MC twins and 122 DC twins) were admitted to the neonatal intensive care unit, and the [Hb] was determined soon after birth. The [Hb] discordance represents the [Hb] of the smaller twin expressed as a percentage of the [Hb] of the larger twin. Infants were followed-up until 1 year of corrected age and their psychomotor development was evaluated between 12 and 18 months. RESULTS One DC infant died by 1 year of age. Twelve MC infants and eight DC infants had disabilities by 1.5 year of age. In the MC group, 11 infants (28%) of 20 pairs with an intertwin [Hb] discordance >100 had disabilities compared with one (3.6%) of 14 pairs with an [Hb] discordance < or = 100 (p

Objectives: We examined the effects of daily vaginal disinfection on the interval between premature rupture of the membranes (PROM) and delivery and on infant outcome. Methods: Daily vaginal disinfection with povidone iodine was performed on 43 women with PROM. The control group consisted of 59 women with PROM who did not undergo vaginal disinfection. In both groups, the infants born to these women were followed until 1 year of corrected age. Results: The degree of cervical dilatation, the leukocyte count, and the serum C-reactive protein level on admission did not differ between the 2 groups. Although there was no difference in the gestational week at delivery between the groups, the interval between PROM and delivery was significantly longer in the disinfectant group than among the control subjects (9.5 ±14.9 days vs. 3.9 ±5.1 days, p < 0.01). There was no difference in infant outcome between the 2 groups. Conclusions: These findings suggest that daily vaginal disinfection with povidone iodine prolongs the duration of gestation in women with PROM and dose not have an adverse effect on the fetus.

The reactions of (±)-α-epoxy drimenol (4) and (±)-α-epoxy drimenyl cyanide (6) with acids (proton acid or Lewis acid) selectively gave the rearranged aldehyde (±)-13 and (±)-15 having the hydroindane skeleton, respectively, while the reactions of (±)-4 and (±)-6 with Dibal-H selectively afforded the allyl alcohol (±)-14 and (±)-16, respectively. The reactions of (8aR)-6 and (8aS)-6 with Dibal-H were applied for the determination of the absolute structure of natural 7β-acetoxy-ent-labda-8(17),13(14)E-dien-15-ol (18). The reaction of (±)-α-epoxy bicyclofarnesol (5) and (8aS)-5 with proton acid selectively provided the rearranged ketol (±)- and (8aS)-31 having the hydroindane skeleton, respectively. The optically active (8aS)-31 was converted to the natural (9S)-austrodoric acid (33).

The structure determination of the title compound, C 31 H 54 OSi, based on single-crystal X-ray diffraction, shows that the absolute configuration at C22 is R

The structures of morusin, 2-(2,4-dihydroxyphenyl)-5-hydroxy-8,8-dimethyl-3-(3-methyl-2-butenyl)- 4H,8H-benzo[1,2-b;3,4-b']dipyran-4-one (C25H24O6) (I) and morusin dimethyl ether, 2-(2,4-dimethoxyphenyl)-5-hydroxy-8,8-dimethyl-3-(3-methyl- 2-butenyl)-4H,8H-benzo[1,2-b;3,4-b']dipyran-4-one (C27H28O6) (II) are reported. In molecules (I) and (II), the benzopyranone moiety is planar. The dihedral angles between benzopyranone moiety and phenyl ring are 66.25 (10) and 85.32 (5)°, respectively. When the dihydroxyphenyl [dimethoxyphenyl for (II)] and 3-methyl-2-butenyl groups are fixed in the same positions to the benzopyranone plane, the pyrano rings of (I) and (II) are enantiomeric.

The crystal structure of an endoperoxide of tetrabenzo[de,hi,op,st]pentacene (TBPA-O2) was determined by X-ray crystallography. The unusually long OO and CO bonds were rationalized by the characteristic molecular structure of TBPA-O2. The photochromic behavior between TBPA-O2 and TBPA was discussed based on the enthalpy difference between TBPA-O2 and TBPA + O2 and the thermodynamic parameters of the extrusion reaction of oxygen from TBPA-O2.

The ternary system FeCl3/2,2′-dipyridyl (1) (Dip)/epoxypropane (2) was found to be active as catalyst for the polymerization of acrylonitrile (4). The lack of one of the catalyst components makes the system inactive for polymerization. The active species is concluded to be partially alkoxylated ferric chloride complexed with 1, and the polymerization might be initiated by the alkoxy group of the complex. Copolymerization of 4 and styrene indicates that the polymerization is anionic at 30°C. At 50 and 80°C, however, both anionic and radical polymerizations seem to take place. As ternare System FeCl3/2,2′-Dipyridyl (1) (Dip)/Epoxypropan (2) ist ein aktives Initiatorsystem fur die Polymerisation von Acrylnitril (4). Das Fehlen einer Katalysatorkomponente fuhrt zu einem polymerisationsinaktiven System. Die aktive Spezies scheint ein partiell alkoxyliertes Eisen(III)-chlorid zu sein, das mit 1 komplexiert ist, und die Polymerisation konnte durch eine Alkoxygruppe dieses Komplexes initiiert werden. Copolymerisationsversuche mit 4 und Styrol zeigen, das die Polymerisation bei 30°C einen anionischen Verlauf nimmt, und das bei 50 und 80°C wahrscheinlich radikalische und anionische Polymerisationsprozesse ablaufen.

The yields and the initial ratios of cis and trans geometries of non-2-ene, tridec-6-ene, or tetradec-7-ene, formed by the cross-metathesis of oct-1-ene and cis- or trans-oct-2-ene catalyzed by tungsten hexachloride–tetraphenyltin (A), hexaphenoxytungsten–ethylaluminium dichloride (B), or tungsten hexachloride–triethylaluminium (C), have been correlated to the interactions of alkyl substituents on tungstacyclobutane. The results strongly suggest that the 2,4-interaction, between the alkyl substituent on C2 and the tungsten moiety, plays an important part in determining the distribution of products.

Last man 1-Octen 24 Stdn. mit (C2H5)3Al-WC15 in gasfreiem Chlorbenzol stehen, so tritt Disproportionierung ein unter Bildung von Athylen, Tetradecen und Alkanen.

The reaction products of the sulfuric acid-catalyzed condensation of cyclooctene or cyclododecene with formaldehyde in acetic acid at 40 °C were investigated. The reaction of cyclooctene gave a mixture of 4,5-hexa-methylene-1,3-dioxane, 2-cyclooctenylmethyl acetate, and 1-acetoxy-2-acetoxymethylcyclooctane, while reaction of cyclododecene gave a mixture of cyclic ethers; one was identified as 3-oxabicyclo[10,3,0]-6-pentadecene, and the others were estimated to be 15-acetoxy-3-oxabicyclo[9,3,1]pentadecane and 12,17-dioxatricyclo[13,3, 0,010,14]-2-octadecene.