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41.
42.
Timke M Wolking D Wang-Lieu NQ Altendorf K Lipski A 《Applied microbiology and biotechnology》2004,66(1):100-107
Biofilms associated with brewery plants can harbour spoiling microorganisms that potentially damage the final product. Most beer-spoiling microorganisms are thought to depend on numerous interactions with the accompanying microbiota. However, there is no information on the microbial community structure of biofilms from bottling plants. The conveyors that transport the bottles to and from the plant are known as potential sources of microbial contamination of beer. Consequently, the material buildup from two conveyors was analysed using a cultivation/isolation approach, and the culture-independent techniques of whole cell fatty acid analysis and fluorescence in situ hybridisation (FISH). Heterogeneous communities were present at both conveyors. Although characteristic fatty acids for Eukarya were present, FISH-signals for Eukarya were extremely low. The Proteobacteria, in particular the Gammaproteobacteria, were abundant at both sample sites. Bacterial isolates were obtained for every dominating group detected by FISH: the Alphaproteobacteria, Betaproteobacteria and Gammaproteobacteria, the Xanthomonadaceae, the Actinobacteria, the Bacteroidetes and the Firmicutes. 相似文献
43.
We report a prenatally diagnosed balanced de novo translocation t(6;7)(p25;q31). Physical examination of the baby born at term revealed only a posterior cleft palate. Laboratory examinations and radiologic investigations were found normal. Two years follow-up of the patient showed her mental and motor development was appropriate with her age. Our report is the first observation on balanced de novo translocation t(6;7)(p25;q31) and cleft palate. Association of this translocation and cleft palate has not been reported previously. 相似文献
44.
Akbas F Aydin M Cenani A 《Anthropologischer Anzeiger; Bericht über die biologisch-anthropologische Literatur》2003,61(3):257-260
We determined the AB0 blood group system with a PCR based technique termed APLP (Amplified Product Length Polymorphism) in the Turkish population. The method includes ten different allele specific primers and permits identification of the major AB0 genotypes and its suballeles (A1-A2-B-0A-02-0G-AG). The suballeles were amplified in a single tube reaction. We have determined AB0 phenotypes in 129 Turkish individuals. No significant deviation from the Hardy-Weinberg equilibrium was observed. 相似文献
45.
Kanber Y Demirbag NR Sam AD Aydin N 《The International journal of biological markers》2002,17(3):165-168
The aim of this study was to investigate the role of cathepsin D in colorectal cancer. For this purpose cathepsin D expression was evaluated by means of immunohistochemistry in stromal and tumor cells of 31 colorectal carcinomas and 29 adenomas. Cytoplasmic cathepsin D expression of tumor cells was present in 90.3% of the carcinoma cases and various degrees of stromal cell cathepsin D expression were present in all cases. In the adenomas, the epithelial cells and stromal cells expressed cathepsin D in 68.96% and 96.55% of cases, respectively. The staining intensity was always weaker in the adenomas. When the stromal and tumor cell cathepsin D expression in the adenocarcinoma and adenoma cases were compared, a statistically significant difference was observed in the staining of stromal cells. Furthermore, stromal cathepsin D expression in the adenocarcinomas was related to tumor stage when the carcinomas were divided into low and high stage. Cathepsin D expression in stromal cells may be an important indicator of poor prognosis in colorectal adenocarcinomas. 相似文献
46.
47.
Dournon C Membre H Brohm PE Coince A Cornu N Dreyer L Florentin J Jeanneau L Henniquin C Houbre M Guerard M Lecomte N Maxant L Schluraff M Venandet AS Jusyte A Simmet D Bocking D Flaig D Santak L Bolek S Goppel V Rossignon JP Trossat MA Raux M Forster S Staudenmaier G Boser S Horn E 《Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology》2002,9(1):P375-P376
The German-French biological experiment AQUARIUS-XENOPUS which flew on the Soyuz flight Andromede to the International Space Station ISS (launched October 21, 2001 in Baikonour/Kazakhstan) was extended by an outreach project. Pupils of class 10 to 12 from Ulm/D and Nancy-Tomblaine/F studied swimming behavior of Xenopus tadpoles on ground. They were instructed to perform all experimental steps following the protocol of similar video recordings on ISS. After the flight, they evaluated the kinetics of swimming of both ground controls and space animals. The pupil project included theoretical components to introduce them to the field of gravitational biology. One feature of the project was the exchange of ideas between pupils by meetings which took place in Ulm (June 2001), Nancy (February 2002) and Paris (May 2002). We consider our approach as a successful way to include young people in space experiments on a cheap cost level and to bring ideas of gravitational biology into the curricula of European schools. 相似文献
48.
Işcan M Ada AO Coban T Kapucuoğlu N Aydin A Isimer A 《Biological trace element research》2002,89(2):177-190
When male rats were given a single dose of cadmium (Cd) (3.58 mg CdCl2·H2O/kg, ip) 72 hr prior to sacrifice, the testicular 7-ethoxyresorufin O-deethylase (EROD) and glutathione S-transferase (GST) activities toward the substrates 1-chloro-2,4-dinitrobenzene (CDNB), 1,2-dichloro-4-nitrobenzene (DCNB),
ethacrynic acid (EAA), 1,2-epoxy-3-(p-nitrophenoxy)-propane (EPNP), and cumene hydroperoxide (CHPx) decreased significantly as compared to controls. Cd also inhibited
reduced glutathione (GSH) level while increasing the lipid peroxidation (LP) level significantly. When the animals were given
a single dose of nickel (Ni) (59.5 mg NiCl2·6H2O/kg, ip) 16 hr prior to sacrifice, significant decreases were observed in EROD and GST activities toward CDNB, EAA, EPNP,
and CHPx, and GSH level. No significant alterations were noted in DCNB GST activity and LP level by Ni. For the combined treatment,
rats received the single dose of Ni 56 hr after the single dose of Cd and were killed 16 hr later. In these animals, lesser
depressions were observed on EROD activity and LP level than those of Cd alone. The combination of metals significantly inhibited
GST activities and GSH level but not to a greater degree than noted by Cd or Ni alone. Plasma testosterone levels of Cd-,
Ni-, and combination-treated rats decreased significantly compared to controls. The strongest depression was achieved by Cd
alone. Cd, both alone and in combination with Ni, increased the tissue Ni uptake significantly. Ni, however, did not produce
such an effect on the tissue uptake of Cd in either case. Cd treatment caused interstitial edema and coagulation necrosis
in seminiferous tubules and also caused fibrinoidal necrosis in vascular endothelium. Ni treatment did not produce any pathological
testicular alterations compared to controls. Combined treatment produced fewer pathological alterations (i.e., only interstitial
edema) than that of Cd treatment. These results reveal that the combination of Cd and Ni does not have a synergistic effect
on testicular xenobiotic metabolizing enzymes, and in contrast, Ni has an ameliorating effect on pathological disturbances
caused by Cd alone in the rat testis. 相似文献
49.
Baydar T Papp A Aydin A Nagymajtenyi L Schulz H Isimer A Sahin G 《Biological trace element research》2003,92(3):231-244
The present study was undertaken to examine possible aluminum (Al) accumulation in the brain of rats and to investigate whether
subchronic exposure to the metal leads to behavioral and neurophysiological changes in both treated and control groups. Each
of the groups consisted of 10 animals. Aluminum chloride (AlCl3) at a low (50 mg/kg/d) or high (200 mg/kg/d) dose was applied to male Wistar rats by gavage for 8 wk. Al-free water by gavage
was given to the control group throughout the experiment. Behavioral effects were evaluated by open-field (OF) motor activity
and by acoustic startle response (ASR). Electrophysiological examination was done by recording spontaneous activity and sensory-evoked
potentials from the visual, somatosensory, as well as auditory cortex. The Al content of each whole brain was determined by
electrothermal atomic absorption spectrophotometry. Subchronic Al exposure slightly caused some changes in the evoked potentials
and electrocorticograms and in the OF and ASR performance, but these results were not statistically significant. The brain
Al levels of the control and the low and high dose of Al-exposed groups were measured as 0.717±0.208 μg/g (wet weight), 0.963±0.491
μg/g (wet weight) and 1.816±1.157 μg/g (wet weight), respectively. 相似文献
50.
Copper is an essential trace element with various biological functions. Excess copper, however, is extremely toxic, leading
to many pathological conditions that are consistent with oxidative damage to membranes and molecules. Exposure to high levels
of copper results in various changes in the tissues. In liver, hypertrophy of hepatocytes, hepatitis, hepatocellular necrosis,
and hepatocellular death are the results. Lipid peroxidation causes dysfunction in the cell membrane, decreased fluidity,
inactivation of receptors and enzymes, and changes ion permeability. In this study, we aimed to determine the effect of copper
on oxidative and antioxidative substances in plasma and liver tissue in a rat model.
Sixteen male Sprague—Dawley rats were divided into two groups: Group 1 rats included control rats given tap water. Group 2
rats were given water containing copper in a dose of 100 μg/mL. All rats were sacrificed at 4 wk under ether anesthesia. Plasma
and liver superoxide dismutase (SOD) activities, plasma and liver MDA (malondialdehyde) levels, and liver glutathione (GSH)
levels were studied. Plasma and liver SOD activities were found to be higher in group 2 than those in group 1. Although plasma
MDA levels were higher in group 2, MDA levels in liver tissues were comparable. Liver tissue glutathione levels were lower
in group 2. It was concluded that although copper is needed in trace amounts, an excess amount is toxic for the organism.
It increases lipid peroxidation and depletes GSH reserves, which makes the organism more vulnerable to other oxidative challenges. 相似文献