Contribution à l'étude expérimentale de la séborrhée. Implications éventuelles en cosmétologie

The sebaceous gland is an androgen-dependent structure and a major site for androgen metabolism. Androgens are involved in stimulation of sebaceous secretion in humans. The object of this study is to contribute to the understanding of the role of these hormones and their metabolites in seborrhea and to comment on the activity of certain inhibitors. Methods used are sebaceous secretion and ¹⁴C-lipogenesis in animals, ¹⁴C-testosterone or DHA metabolism in animal and human skin. Our results showed that: – by subcutaneous administration in rats, there was a relative specificity of weak androgens for sebaceous gland stimulation unlike potent androgens.     

无"décor接缝"的安全气囊

Reiner激光技术公司是世界上首家用激光切割纺织品的公司.先进的激光切割技术在织物上不留下任何切口.这种创新结合了具有节约成本潜力的设计理念.     

Volatile flavor composition of <Emphasis Type="Italic">gamguk</Emphasis> (<Emphasis Type="Italic">Chrysanthemum indicum</Emphasis>) flower essential oils

The volatile composition of the essential oil from fresh gamguk (Chrysanthemum indicum) flowers was investigated. The volatile constituents were extracted by the hydro distillation method. Volatile compositional changes of gamguk prepared via different drying methods (shade- and freeze-drying methods) were also determined. Total 36, 63, and 55 volatiles constituents were confirmed in the essential oil from fresh and shade-, and freeze-dried flowers. Ketones were predominant in the volatiles of gamguk flowers (%): fresh, 43.8; shade dried, 30.3; and freeze dried, 36.1. Camphor was the most abundant volatile component in all samples, and the content of borneol was also remarkable. The content of camphor was higher in fresh sample than those of dried samples while borneol concentration was significantly increased in the dried samples.     

Quality changes in soup from deboned chicken frames at refrigerated (4 ± 1 °C) and frozen (−18 ± 1 °C) storage

Chicken soup was made from the broth collected after the pressure cooking of deboned chicken frames (bones). The quality of stored chicken soup (S1) was compared with the soup prepared from the stored chicken broth (S2) at refrigerated (4 ± 1 °C) and frozen (−18 ± 1 °C) storage up to 12 and 90 days, respectively. Thiobarbituric acid reactive substances values and microbial counts were significantly ( P  < 0.01) higher in stored soup (S1) compared with fresh soup (S2). Psychrotrophs and coliforms were not detected. Appearance and odour scores of broth were satisfactory throughout the storage. Sensory attributes were rated better for fresh soup (S2) made from stored broth than stored soup (S1) but all the attributes were decreased with increasing storage period. The stored soup was acceptable up to 9 and 90 days in refrigeration and frozen storage respectively, while the soup made from refrigerated stored broth was acceptable for 12 days.     

<Emphasis Type="Italic">In vitro</Emphasis> characterization study of <Emphasis Type="Italic">Bacillus mojavensis</Emphasis> KJS-3 for a potential probiotic

The identification and characterization of Bacillus mojavensis KJS-3 was performed by in vitro tests. A 16S rDNA sequence and phylogenetic tree demonstrated that this isolate belongs to the B. mojavensis group. B. mojavensis KJS-3 supplies nutrients by synthesizing several vitamins. B. mojavensis KJS-3 produces α-amylase and protease. B. mojavensis KJS-3 is cultured well under aerobic conditions without gas production. B. mojavensis KJS-3 allows for assimilation of cholesterol and bile salt hydrolase activity. Finally, adhesion experiments using Caco-2 cells revealed that the adherence of B. mojavensis KJS-3 to Caco-2 cells was approximately 51.2±8.14%.     

Einfluß organischer Düngung auf die Größe der Stärkekörner von Kartoffeln

Effect of Organic Fertilizers on Size of Starch Granules of Potatoes . The influence of cattle faecal matter combined with mineral fertilizers on tuber crop, dry substance content, yield and content of starch, and starch quality of potatoes was studied. From technological point of view for production of starch potatoes with high tuber yield and responding starch content all variations consisting of cattle faecal matter with addition of N, P, K proved to be favourable. The best combination was that of straw and cattle faecal matter with added N, P, K-fertilizers. Problems concerning the selection of the most favourable variation are discussed.     

Effect of <Emphasis Type="Italic">Carica papaya</Emphasis> and <Emphasis Type="Italic">Cucumis melo</Emphasis> seed oils on the soybean oil stability

This study aimed to evaluate the oils of soybean (S), papaya (Pa) and melon (Me) seeds and compounds oils SPa (80:20 w/w); SMe (80:20 w/w); and SPaMe (60:20:20 w/w/w) subjected to thermoxidation. Compound oils showed lower percentages of free fatty acids in relation to others, after 20 h. With the heating process, there was an increase in the quantity of saturated and monounsaturated acids. The quantity of carotenoids decreased, except in papaya seed oil that presented significant amount of carotenoids in 20 h. In relation the tocopherols, highlighted the presence of γ-tocopherol, except in the papaya oil. In 20 h, SMe and SPa still showed high amounts of tocopherols, with 76 and 85% of retention, respectively. With the thermoxidation, the amounts of phytosterols decreased. A great potential can be verified for the use of papaya and melon seed oils, in order to increase the oxidative stability of the soybean oil.     

Propriétés antiélastasiques des propionylaminoacides

Antielastase activity of derivatives like 'propionylaminoacid'(C₃ prolin, C₃ hydroxyprolin, C₃ collagen) was examined for pancreatic elastase, and fibroblastic elastase production. Essential metabolic variations of normal dermal fibroblasts were evaluated: adhesion, proliferation capacity, total protein biosynthesis and collagen type I and type III production. Possible other factors such as cellular nutrients were examined by oxygen consumption evaluation.
Propionylaminoacid derivatives have antielastase activities. Pancreatic elastase showed dose related inhibition (20% to 50% inhibition for concentration from 5 to 80 mg ml⁻¹.
Moreover, fibroblastic elastase production was inhibited, cellular respiration was enhanced. A very good tolerance in vitro was observed for concentration 0–1 mg ml⁻¹ range: adhesion, proliferation capacity and collagen (type I and type III) production were not altered, and oxygen consumption was enhanced.     

Characterization of moisture content and specific gravity of branchwood and stemwood of <Emphasis Type="Italic">Aningeria robusta</Emphasis> and <Emphasis Type="Italic">Terminalia ivorensis</Emphasis>

Aningeria robusta and Terminalia ivorensis of diameters ranging from 10 cm to 25 cm were examined. The following results were obtained: The overall (sapwood and heartwood combined) moisture contents of the branchwood of both Aningeria robusta and Terminalia ivorensis were significantly greater than those of their corresponding stemwood, with the branchwood of Terminalia ivorensis being the highest. It was also observed that the overall specific gravity of the branchwoods of both species was higher than that of the corresponding stemwood, with the branchwood of Aningeria robusta exhibiting the highest specific gravity. Detailed analyses of moisture content distribution and specific gravity of the heartwood and sapwood of Aningeria robusta and Terminalia ivorensis are also presented.     

Disinfection effect and its mechanism of electrolyzed oxidizing water on spores of <Emphasis Type="Italic">Bacillus subtilis</Emphasis> var. <Emphasis Type="Italic">niger</Emphasis>

A study was carried out on the disinfection efficiency of electrolyzed oxidizing water (EOW) on spores of Bacillus subtilis var. niger. The results showed a remarkable fungicidal rate of 100% after 20 min duration of 191 mg/L active available chlorine (ACC). The disinfection effect was improved with increased ACC or prolonged disinfection time, while organic interferents exerted a strong concentration-dependent inhibition against the disinfection. The disinfection mechanism was also investigated at bio-molecular level. EOW decreased dehydrogenase activity, intensified membrane permeability, elevated suspension conductivity, and caused leakage of intracellular K⁺, proteins, and DNA, indicating a damage of cell walls and membranes. Effects of EOW on microbiological ultra-structures were also verified by transmission electronic microscopy (TEM) images, showing that EOW destroyed protective barriers of the microbe and imposed some damages upon the nucleus area.