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排序方式: 共有34条查询结果,搜索用时 15 毫秒
1.
Eva Havrnkov Vladimír Garaj rka Mascaretti Andrea Angeli Zuzana Soldnov Miroslav Kemka Jozef Moty
ka Marie Brzdov Jozef Csllei Josef Jampílek Claudiu T. Supuran 《International journal of molecular sciences》2022,23(1)
A series of 1,3,5-triazinyl aminobenzenesulfonamides substituted by aminoalcohol, aminostilbene, and aminochalcone structural motifs was synthesized as potential human carbonic anhydrase (hCA) inhibitors. The compounds were evaluated on their inhibition of tumor-associated hCA IX and hCA XII, hCA VII isoenzyme present in the brain, and physiologically important hCA I and hCA II. While the test compounds had only a negligible effect on physiologically important isoenzymes, many of the studied compounds significantly affected the hCA IX isoenzyme. Several compounds showed activity against hCA XII; (E)-4-{2-[(4-[(2,3-dihydroxypropyl)amino]-6-[(4-styrylphenyl)amino]-1,3,5-triazin-2-yl)amino]ethyl}benzenesulfonamide (31) and (E)-4-{2-[(4-[(4-hydroxyphenyl)amino]-6-[(4-styrylphenyl)amino]-1,3,5-triazin-2-yl)amino]ethyl}benzenesulfonamide (32) were the most effective inhibitors with KIs = 4.4 and 5.9 nM, respectively. In addition, the compounds were tested against vancomycin-resistant Enterococcus faecalis (VRE) isolates. (E)-4-[2-({4-[(4-cinnamoylphenyl)amino]-6-[(4-hydroxyphenyl)amino]-1,3,5-triazin-2-yl}amino)ethyl]benzenesulfonamide (21) (MIC = 26.33 µM) and derivative 32 (MIC range 13.80–55.20 µM) demonstrated the highest activity against all tested strains. The most active compounds were evaluated for their cytotoxicity against the Human Colorectal Tumor Cell Line (HCT116 p53 +/+). Only 4,4’-[(6-chloro-1,3,5-triazin-2,4-diyl)bis(iminomethylene)]dibenzenesulfonamide (7) and compound 32 demonstrated an IC50 of ca. 6.5 μM; otherwise, the other selected derivatives did not show toxicity at concentrations up to 50 µM. The molecular modeling and docking of active compounds into various hCA isoenzymes, including bacterial carbonic anhydrase, specifically α-CA present in VRE, was performed to try to outline a possible mechanism of selective anti-VRE activity. 相似文献
2.
The problems related to our strong dependency on fossil fuels, i.e. greenhouse effect, energy dependency, urban pollution, are of growing importance in recent years. European Union (EU) Action plan of 2003, which had originated from Kyoto Agreement, defined a strategy for substitution of 20% of conventional fuel with the alternative one by 2020. Proved advantages of biodiesel usage in the system of public transport of passengers, with regard to exhaust gases emission above all, have been the decisive determinants for the actual promotion of biodiesel as ecologically “clean” fuel, while its wider usage gives important contribution to sustainable development of cities. This paper presents results of biodiesel-test run in Belgrade, as a part of the project BIO-PEX, which relates to the usage of this alternative fuel in real operating conditions in urban public transport system, with special emphasis on technical, ecological and operational aspects of biofuel usage. 相似文献
3.
Summary. A 1,1'-binaphthol based optically active oligomer 6 with 3,3'-acetylene spacer was prepared from 2,2'-dimethoxy-1,1'-binaphthalene 3 through the palladium-catalyzed Stille coupling reaction. The high optical rotation and CD spectrum varified the main chain
chirality of the oligomer. The photophysical properties of 6, absorption, excitation and fluorescent spectra, demonstrated that the oligomer molecule had a conjugated structure, but
twisting and rigid conformation would reduce the delocalization along the backbone. 相似文献
4.
Vasomotor, somatic, and psychological symptoms associated with menopause are often treated with hormone replacement therapy (HRT), but the role of nonpharmacological interventions has received little attention. Two studies used the Profile of Mood States (POMS) and Women's Health Questionnaire (WHQ) to examine the effects of exercise among 4 groups of Australian women: premenopausal, perimenopausal, postmenopausal without HRT, and postmenopausal with HRT. Study 1, a comparison of exercisers and nonexercisers, showed that exercisers' moods were significantly more positive than sedentary women's moods, regardless of menopausal state. Exercising women also scored lower on somatic symptoms and memory-concentration difficulties. Study 2 examined the acute effects of aerobic exercise (premenopausal, postmenopausal without HRT, and postmenopausal with HRT) and found significant enhancements in mood and reductions in reported somatic and vasomotor symptoms immediately following an aerobic class. Exercise may assist in the alleviation of some menopausal symptoms. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
5.
Slaven Jurić Marina Jurić Giovanna Ferrari Anet Režek Jambrak Francesco Donsì 《International Journal of Food Science & Technology》2021,56(10):4907-4914
Tomato processing residues are still rich in bioactive compounds that may be recovered and reused, with environmental and economic benefits. This short communication discloses for the first time that the high-pressure homogenisation (HPH) treatment of tomato residues in the presence of water and sunflower oil is able to promote the extraction of bioactive compounds concurrently to the formation of an oil-in-water emulsion stabilised by the micronized residues. The mechanical disruption effect of HPH improved the mass transfer of lycopene into the oil phase, and formed fine fibrous debris, improving stabilisation and visual appearance of the emulsion. Results showed a progressive increase of lycopene concentration in the cream phase up to 5 HPH passes and a concurrent reduction of its content in the pellet. Total polyphenols content and antioxidant activity in the aqueous phase gradually decreased when increasing the number of passes, suggesting their progressive transfer in the cream phase. The proposed process that relies on a purely physical treatment and uses only water/sunflower oil as extraction media resulted in the production of a lycopene-rich cream of potential use as a functional food ingredient. 相似文献
6.
Darikha Kudasova Botagoz Mutaliyeva Kristina Vlahovi
ek-Kahlina Slaven Juri Marijan Marijan Svetlana V. Khalus Alexander V. Prosyanik Suzana egota Nikola pani Marko Vincekovi 《International journal of molecular sciences》2021,22(5)
A new copper complex, trans-diaqua-trans-bis [1-hydroxy-1,2-di (methoxycarbonyl) ethenato] copper (abbreviation Cu(II) complex), was synthesized and its plant growth regulation properties were investigated. The results show a sharp dependence of growth regulation activity of the Cu(II) complex on the type of culture and its concentration. New plant growth regulator accelerated the development of the corn root system (the increase in both length and weight) but showed a smaller effect on the development of the wheat and barley root systems. Stimulation of corn growth decreased with increasing Cu(II) complex concentration from 0.0001% to 0.01% (inhibition at high concentrations—0.01%). The development of corn stems was also accelerated but to a lesser extent. Chitosan-coated calcium alginate microcapsules suitable for delivery of Cu(II) complex to plants were prepared and characterized. Analysis of the FTIR spectrum showed that complex molecular interactions between functional groups of microcapsule constituents include mainly electrostatic interactions and hydrogen bonds. Microcapsules surface exhibits a soft granular surface structure with substructures consisting of abundant smaller particles with reduced surface roughness. Release profile analysis showed Fickian diffusion is the rate-controlling mechanism of Cu(II) complex releasing. The obtained results give new insights into the complexity of the interaction between the Cu(II) complex and microcapsule formulation constituents, which can be of great help in accelerating product development for the application in agriculture 相似文献
7.
Steady-state kinetics on the reaction catalyzed by the beta-glucosidase of Aspergillus niger were carried out to evaluate the kinetic parameters, Km and ko, for phenyl beta-D-glucosides. The ko/Km values, which may relate to productive binding at subsites, were found to correlate with the substituent constant pi (hydrophobicity), suggesting that subsite 2 has a hydrophobic character. A "hydrophobic-driven" mechanism is considered to contribute to the productive E-S complex for recognition of the substrate. 相似文献
8.
Graphene synthesis by ion implantation 总被引:1,自引:0,他引:1
We demonstrate an ion implantation method for large-scale synthesis of high quality graphene films with controllable thickness. Thermally annealing polycrystalline nickel substrates that have been ion implanted with carbon atoms results in the surface growth of graphene films whose average thickness is controlled by implantation dose. The graphene film quality, as probed with Raman and electrical measurements, is comparable to previously reported synthesis methods. The implantation synthesis method can be generalized to a variety of metallic substrates and growth temperatures, since it does not require a decomposition of chemical precursors or a solvation of carbon into the substrate. 相似文献
9.
This study examines the utility of a sleeve anastomosis with comparison to conventional end to end anastomosis. Thirty New Zealand white rabbits were randomized to sleeve (n = 15) or end-to-end (n = 15) small bowel anastomosis. Five rabbits of each group were sacrificed at 3 days, 7 days, and 6 weeks. Anastomoses were assessed for integrity, bursting strength, and stenosis and examined histologically. Ten control specimens of small bowel were tested for bursting pressure. Three rabbits died postoperatively (1 sleeve and 2 end-to-end). A fourth rabbit (sleeve) was sacrificed early at 3 weeks and had a total stenosis at the anastomosis. The remaining 26 rabbits were reoperated at the prescribed times. There was no evidence of infection or dehiscence in any of these rabbits. Both end-to-end and sleeve anastomoses were equivalent for bursting pressure at all times and, at 7 days and 6 weeks, were similar to controls. The stenotic index revealed no evidence of proximal dilation suggestive of obstruction in the 26 rabbits. For sleeve anastomoses the length of the projected bowel into the lumen persisted at the 6-week stage. Histologically there was good evidence of healing in both the sleeve and end-to-end anstomoses and the serosal surface of the sleeved bowel had epithelialized. Sleeve anastomosis has been demonstrated to heal well and to be as strong as conventional end-to-end anastomosis. Further studies are warranted to determine its role in intestinal anastomosis and potential as a valve. 相似文献
10.
Joseph O’Neil Marilyn J. Bull James E. Slaven Judith L. Talty 《Accident; analysis and prevention》2012