Search Results - (Author, Cooperation:H. Ribeiro)

2018-01-27

American Physical Society (APS)

0031-9007

1079-7114

Physics

General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

2014-08-01

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

Animals ; Cell Survival ; Cyclic AMP Response Element-Binding Protein/metabolism ; Enzyme Activation ; Female ; Hematopoiesis ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/*cytology/*metabolism ; Humans ; Male ; Mice ; Mice, Inbred C57BL ; Nerve Growth Factors/*metabolism ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Proto-Oncogene Proteins c-ret/deficiency/genetics/*metabolism ; Signal Transduction ; Stem Cell Niche ; bcl-X Protein/metabolism ; p38 Mitogen-Activated Protein Kinases/metabolism

2018-10-24

American Chemical Society (ACS)

0002-7863

1520-5126

Chemistry and Pharmacology

2014-03-29

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

Animals ; Cell Differentiation/drug effects/immunology ; Diet ; Female ; Fetus/drug effects/*immunology ; Immunity, Innate/drug effects/*immunology ; Lymphoid Tissue/cytology/drug effects/embryology/immunology ; Mice ; Mice, Inbred C57BL ; Pregnancy ; Prenatal Exposure Delayed Effects/*immunology ; Receptors, Retinoic Acid/metabolism ; Signal Transduction/drug effects ; Stem Cells/cytology/drug effects/immunology ; Tretinoin/administration & dosage/*immunology/metabolism/*pharmacology

1468-2494

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Oil-in-water (o/w) emulsions for cosmetic use, such as lotions and creams, are complex multiple-phase systems, which may contain a number of interacting surfactants, fatty amphiphiles, polymers and other excipients. This study investigates the influence of two synthetic cationic polymers, Polyquaternium-7 and Polyquaternium-11, and the natural anionic polymer, gum of acacia, on the rheology and microstructure of creams prepared with a non-ionic mixed emulsifier (cetyl stearyl alcohol-12EO/cetyl alcohol) using rheology (continuous shear, and viscoelastic creep and oscillation), microscopy and differential scanning calorimetry (DSC). A control cream containing no polymer was also investigated. The semisolid control cream was structured by a swollen lamellar gel network phase formed from the interaction of cetyl alcohol and the POE surfactant, in excess of that required to stabilize oil droplets, with continuous phase water. Endothermic transitions between 25 and 100 °C were identified as components of this phase. Incorporation of cationic polymer into the formulation caused significant loss of structure to produce a mobile semisolid containing larger oil droplets. The microscopical and thermal data implied that the cationic polymer caused the swollen lamellar gel network phase to transform into non-swollen crystals of cetyl alcohol. In contrast, incorporation of gum of acacia produced a thicker cream than the control, with smaller droplet sizes and little evidence of the gel network. Microscopical and thermal data implied that although there were also interactions between gum of acacia and both the surfactant and the swollen gel network phase, the semisolid properties were probably because of the ability of the gum of acacia to stabilize and thicken the emulsion in the absence of the swollen lamellar network.

Electronic Resource

1750-3841

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

The chemical stability of lycopene and the physical stability of lycopene emulsions diluted in 3 different food systems (skimmed milk, orange juice, and water as control) were studied. In these investigations, 3 different emulsifiers were used. It was found that lycopene stability strongly depends on the food system. In orange juice, lycopene is particularly stable. The emulsifiers used have only little influence on the stability of lycopene. Emulsions with α-tocopherol as an additional antioxidant showed a good lycopene stability in all food systems. Coalescence of oil droplets was not observed in any of the food systems investigated. Keywords: lycopene, stability, food systems

Electronic Resource

1398-9995

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Electronic Resource

1570-7458

Anticarsia gemmatalis/ ; Anticarsia gemmatalis multiple nucleocapsid nuclear polyhedrosis virus (AgMNPV) ; Diatraea saccharalis ; baculovirus ; genotypic variants ; in vivo selection

Springer Online Journal Archives 1860-2000

Biology

Abstract The susceptibility of third instar larvae of Anticarsia gemmatalis (Lepidoptera: Noctuidae) and Diatraea saccharalis (Lepidoptera: Pyralidae) to ten distinct plaque purified genotypic variants of a selected isolate of the Anticarsia gemmatalis multiple-embedded nuclear polyhedrosis virus (AgMNPV), was compared. Despite the fact that this isolate, AgMNPV-Ds20, represents a wild strain of the AgMNPV selected for higher virulence to D. saccharalis, an alternate host, most of the variants are much more virulent to the original host Anticarsia than to Diatraea. Bioassays have shown an over one hundred-fold variation in LD50 values ranging from 1700 polyhedron inclusion bodies (PIBs) to more than 200 000 PIBs/larva. The PIB production in infected larvae increased with the pathogenicity of the variant to the host, showing an average ten-fold reduction in Diatraea when compared to Anticarsia for the same variant. The virus particle yield ranged from 6×107 to more than 109 PIBs/g of infected larvae in Diatraea and from 8×108 to more than 1010 PIBs/g of infected Anticarsia larvae. The data show a clear difference of the pathogenicity of the genotypic variants of AgMNPV in vivo both between the original and alternate host and between the individual variants for the same host. These differences found in vivo indicate that monitoring of shifts in variant frequency of wild and laboratory-propagated viral isolates in these highly heterogeneous populations would help ensure the efficacy of biological control programs.

Electronic Resource

1432-0665

Springer Online Journal Archives 1860-2000

Mathematics

Electronic Resource

1432-0509

Key words: Crohn's disease—Complications—Calculi—Radiology—Stricture—Enterolith.

Springer Online Journal Archives 1860-2000

Medicine

Abstract Enterolithiasis of the small bowel is unusual. Etiologic factors include stasis secondary to intestinal strictures or diverticula. There have been 19 reported cases of enteroliths associated with Crohn's disease and we report three additional patients. Enteroliths only occur in longstanding Crohn's disease and are important clues to the presence of underlying strictures; they may occur as a result of adenocarcinoma complicating Crohn's disease. The radiologic features of enteroliths are discussed.

Electronic Resource