Nanocarbons And Quantum Dots Formation In New Hybrid Materials

We present technique of obtaining complex hybrid structures combining the multi-walled carbon nanotubes or multi-layer graphene and luminescent hydrophobic semiconductor core/shell quantum dots CdSe/ZnS. As a result, a formation of quantum dot decorated carbon nanotubes and graphene films is evidenced by 2D microluminescence and micro-Raman mapping of quantum dots and nanocarbons, respectively, where a spatial correlation between the luminescence and Raman signals is found. © 2014 SPIE.912612-02-00938; RFBR; Russian Foundation for Basic Research; 12-02-01263; RFBR; Russian Foundation for Basic ResearchKalantar-Zadeh, K., (2008) Nanotechnology-Enabled Sensors, p. 490. , K. Kalantar-zadeh, B. Fry. New York.: Springer Science & Business Media(1955) Springer Handbook of Nanotechnology, , Ed. B. Bhusha.-New York.: Springer Science & Business Media, 2010, ISBN: 978-3-642-02524-2Cattanach, K., Kulkarni, R.D., Kozlov, M., Manohar, S.K., Flexible carbon nanotube sensors for nerve agent simulants (2006) Nanotechnology, 17, pp. 4123-4128Peng, S., O'Keeffe, J., Wei, C., Cho, K., Kong, J., Chen, R., Franklin, N., Dai, H., Carbon nanotube chemical and mechanical sensors (2001) Proceedings of the 3rd International Workshop on Structural Health Monitoring, pp. 1-8. , USA, September 17-19, 2001, Stanford University, StanfordSnow, E.S., Perkins, F.K., Houser, E.H., Badescu, S.C., Reinecke, T.L., (2005) Science, 307, pp. 1942-1945. , Chemical detection with a single-walled carbon nanotube capacitorStar, A., Joshi, V., Skarupo, S., Thomas, D., Gabriel, J.-C.P., Gas sensor array based on metal-decorated carbon nanotubes (2006) J. Phys. Chem. B, 110, pp. 21014-21020Xu, Z., Gao, H., Guoxin, H., Solution-based synthesis and characterization of a silver nanoparticle-graphene hybrid film Carbon, 49 (14), pp. 4731-4738Cao, A., Liu, Z., Chu, S., Wu, M., Ye, Z., Cai, Z., Chang, Y., Liu, Y., A facile one-step method to produce graphene-cds quantum dot nanocomposites as promising optoelectronic materials (2010) Adv. Mater, 22, pp. 103-106Yang, Y.-K., He, Ch.-E., He, W.-J., Yu, L.-J., Peng, R.-G., Xie, X.-L., Wang, X.-B., Mai, Y.-W., Reduction of silver nanoparticles onto graphene oxide nanosheets with N,Ndimethylformamide and SERS activities of GO/Ag composites (2011) J Nanopart. Res, 13, pp. 5571-5581Lightcap, V., Kamat, P.V., Fortification of cdse quantum dots with graphene oxide. Excited state interactions and light energy conversion (2012) J. Am. Chem. Soc, 134, pp. 7109-7116Ghosh, A., Rao, K.V., Voggu, R., George, S.J., Non-covalent functionalization, solubilization of graphene and single-walled carbon nanotubes with aromatic donor and acceptor molecules (2010) Chemical Physics Letters, 488, pp. 198-201Kim, Y.-T., Han, J.H., Hong, B.H., Kwon, Y.-U., Electrochemical synthesis of cdse quantum-dot arrays on a graphene basal plane using mesoporous silica thin-film templates (2010) Adv. Mater, 22, pp. 515-518Konstantatos, G., Badioli, M., Gaudreau, L., Osmond, J., Bernechea, M., Arquer De Garcia, F.P., Gatti, F., Koppens, L.F.H., Hybrid graphene-quantum dot phototransistors with ultrahigh gain (2012) Nature Nanotechnology, 7, pp. 363-368Wang, Y., Yao, H.-B., Wang, X.-H., Yu, Sh.-H., One-pot facile decoration of CdSe quantum dots on graphene nanosheets: Novel graphene-CdSe nanocomposites with tunable fluorescent properties (2011) J. Mater. Chem, 21, pp. 562-566Murray, C.B., Gaschler, W., Sun, S., Doyle, H., Betley, T.A., Kagan, C.R., Colloidal synthesis of nanocrystals and nanocrystal superlattices IBM J. Res. & Dev., 45 (1), pp. 47-56Ermakov, V.A., Alaferdov, A.V., Vaz, A.R., Baranov, A.V., Moshkalev, S.A., Nonlocal laser annealing to improve thermal contacts between multi-layer graphene and metals (2013) Nanotechnology, 24 (15), p. 15530110Bogdanov, K., Fedorov, A., Osipov, V., Enoki, T., Takai, K., Hayashi, T., Ermakov, V., Moshkalev A, S., Annealing-induced structural changes of carbon onions: High-resolution transmission electron microscopy and Raman studies Baranov Carbon, , 02/201

Fragmentation and Multifragmentation of 10.6A GeV Gold Nuclei

We present the results of a study performed on the interactions of 10.6A GeV gold nuclei in nuclear emulsions. In a minimum bias sample of 1311 interac- tions, 5260 helium nuclei and 2622 heavy fragments were observed as Au projec- tile fragments. The experimental data are analyzed with particular emphasis of target separation interactions in emulsions and study of criticalexponents. Multiplicity distributions of the fast-moving projectile fragments are inves- tigated. Charged fragment moments, conditional moments as well as two and three -body asymmetries of the fast moving projectile particles are determined in terms of the total charge remaining bound in the multiply charged projectile fragments. Some differences in the average yields of helium nuclei and heavier fragments are observed, which may be attributed to a target effect. However, two and three-body asymmetries and conditional moments indicate that the breakup mechanism of the projectile seems to be independent of target mass. We looked for evidence of critical point observable in finite nuclei by study the resulting charged fragments distributions. We have obtained the values for the critical exponents gamma, beta and tau and compare our results with those at lower energy experiment (1.0A GeV data). The values suggest that a phase transition like behavior, is observed.Comment: latex, revtex, 28 pages, 12 figures, 3tables, submitted to Europysics Journal

Evaluation of development prospects of renewable energy source for Russia

The main mechanisms for supporting renewable energy sources (RES) in the wholesale electricity and capacity market, in the retail market and in isolated power systems have been studied. The article analyzes the ecological, social and economic effects of the development of renewable energy in the territory of Russia. Based on official information, the authors gave a quantitative assessment of the effects: Increasing export earnings, reducing environmental costs, creating jobs, etc. An integral effect was assessed for the Russian economy from the development of RES, including various levels of budgets and extra-budgetary funds in the form of duties, taxes and insurance contributions. During the analysis of the development of renewable energy in the territory of Russia, the authors identified the main effects of its use and proposed methods for quantifying the effects determined. The obtained results, like the methodological approaches described in the article, can be used at the federal and regional levels in the development of state support mechanisms for renewable energy, while carrying out technical and economic calculations for projects and programs in the field of renewable resources and energy sources. © 2017, Econjournals. All rights reserved

Induction of Apoptotic Endonuclease EndoG with DNA-Damaging Agents Initiates Alternative Splicing of Telomerase Catalytic Subunit hTERT and Inhibition of Telomerase Activity hTERT in Human CD4+ and CD8+ Т Lymphocytes

Activity of the telomerase catalytic subunit hTERT (human Telomerase Reverse Transcriptase) can be regulated by alternative splicing of its mRNA. At the present time, the exact mechanism of hTERT splicing is not fully understood. Apoptotic endonuclease EndoG is known to participate this process. EndoG expression is induced by DNA damages. The aim of this work was to investigate the ability of DNA-damaging agents with different mechanism of action to induce EndoG expression and to inhibit telomerase activity due to the activation of hTERT alternative splicing in normal activated human CD4+ and CD8+ Т lymphocytes. All investigated DNA-damaging agents were able to induce EndoG expression. Cisplatin, a therapeutic compound, producing DNA cross-links induced the highest level of DNA damages and EndoG expression. Incubation of CD4+ and CD8+ Т cells with cisplatin caused the changes in proportion of hTERT splice variants and inhibition of telomerase activity. © 2018, Pleiades Publishing, Ltd

Evaluation of development prospects of renewable energy source for Russia

The main mechanisms for supporting renewable energy sources (RES) in the wholesale electricity and capacity market, in the retail market and in isolated power systems have been studied. The article analyzes the ecological, social and economic effects of the development of renewable energy in the territory of Russia. Based on official information, the authors gave a quantitative assessment of the effects: Increasing export earnings, reducing environmental costs, creating jobs, etc. An integral effect was assessed for the Russian economy from the development of RES, including various levels of budgets and extra-budgetary funds in the form of duties, taxes and insurance contributions. During the analysis of the development of renewable energy in the territory of Russia, the authors identified the main effects of its use and proposed methods for quantifying the effects determined. The obtained results, like the methodological approaches described in the article, can be used at the federal and regional levels in the development of state support mechanisms for renewable energy, while carrying out technical and economic calculations for projects and programs in the field of renewable resources and energy sources. © 2017, Econjournals. All rights reserved

Может ли трансанальная эндомикрохирургия являться основным методом лечения раннего рака прямой кишки.

Aim. Transanal endoscopic microsurgery (TEM) is a main treatment technique for rectal adenomas, but can also be used for selected malignant tumors. This study presents TEM experience.Methods. The study enrolled patients with rectal adenomas, and selected adenocarcinomas. Preoperative work-up included: digital rectal examination, rectoscopy with biopsy, colonoscopy, EUS, pelvic MRI.Results. Three hundred and thirty patients [mean age of 61,4±10 (33–88)] underwent TEM. The mean size ± SD of tumors was 3.2±1.2 cm (0.6–10.0). Mean distance from anal verge was 6.7±2.6 cm (2.0–14.0). Preoperative biopsy revealed: adenoma ― 263/330 (79,7%), adenocarcinoma ― 67/330 (20,3%). The median operating time was 40 (15–220) min. Tumor-free margins were obtained in all operative specimens. In 5/330 (1.5%) cases tumors were fragmented. The morbidity rate was 19/330 (5.7%). Pathological investigation revealed: adenoma in 192/330 (58.1%) cases, adenocarcinoma stage Tis, T1, T2 and T3 in 138/330 (41.9%). Median follow-up lasted for 24 (1–57) months. Five patients (2.0%) with adenoma and four patients (5.2%) with adenocarcinoma had local recurrence.Conclusion. Transanal endoscopic microsurgery for rectal adenomas and selected malignant tumors is associated with low morbidity and low recurrents rates.Введение. Трансанальная эндомикрохирургия является основным методом лечения аденом прямой кишки. Вместе с тем ограничением к его использованию при аденокарциномах прямой кишки могут быть различные факторы риска развития рецидивов в зоне первичной операции.Цель исследования: изучение накопленного опыта по применению способа трансанального удаления доброкачественных опухолей прямой кишки с использованием системы для обеспечения микрохирургических манипуляций ТЕМ (Transanal endoscopic microsurgery).Методы. В исследование были включены пациенты с гистологически подтвержденными аденомами и аденокарциномами прямой кишки. Предоперационное обследование включало пальцевое исследование прямой кишки, ректоскопию с биопсией, колоноскопию, эндоректальное ультразвуковое исследование, магнитно-резонансную томографию малого таза.Результаты. Операции методом трансанальной эндомикрохирургии выполнены 330 пациентам (средний возраст 61,4±10 (33–88) лет), в числе которых было 208 (63,0%) женщин.Средний размер опухоли составил 3,2±1,2 (0,6–10,0) см; среднее расстояние от нижнего полюса опухоли до наружного края анального канала ― 6,7±2,6 (2,0–14,0) см. По результатам предоперационной биопсии, аденома выявлена у 263/330 (79,7%) больных, аденокарцинома ― у 67/330 (20,3%). Медиана времени операции составила 40 (15–220) мин. Края резекции, свободные от опухоли, были получены во всех операционных препаратах. В 5/330 (1,5%) случаях отмечена фрагментация опухоли. Послеоперационные осложнения наблюдались у 19/330 (5,7%) пациентов. При патоморфологическом исследовании удаленных препаратов аденома выявлена у 192/330 (58,1%) больных, аденокарцинома в стадиях Tis, Т1, Т2 и Т3 ― у 138/330 (41,9%). Медиана наблюдения больных составила 24 (1–57) мес. Местный рецидив аденомы после трансанальной эндомикрохирургии развился в 2% наблюдений. Рецидив аденокарциномы в зоне первичной операции после хирургического вмешательства выявлен у 5,2% больных.Заключение. Трансанальная эндомикрохирургия является безопасным методом в лечении новообразований прямой кишки. Использование метода при удалении аденокарцином прямой кишки может быть ограничено, что зависит от предоперационной оценки стадии новообразования

Induction of Apoptotic Endonuclease EndoG with DNA-Damaging Agents Initiates Alternative Splicing of Telomerase Catalytic Subunit hTERT and Inhibition of Telomerase Activity hTERT in Human CD4+ and CD8+ Т Lymphocytes

Activity of the telomerase catalytic subunit hTERT (human Telomerase Reverse Transcriptase) can be regulated by alternative splicing of its mRNA. At the present time, the exact mechanism of hTERT splicing is not fully understood. Apoptotic endonuclease EndoG is known to participate this process. EndoG expression is induced by DNA damages. The aim of this work was to investigate the ability of DNA-damaging agents with different mechanism of action to induce EndoG expression and to inhibit telomerase activity due to the activation of hTERT alternative splicing in normal activated human CD4+ and CD8+ Т lymphocytes. All investigated DNA-damaging agents were able to induce EndoG expression. Cisplatin, a therapeutic compound, producing DNA cross-links induced the highest level of DNA damages and EndoG expression. Incubation of CD4+ and CD8+ Т cells with cisplatin caused the changes in proportion of hTERT splice variants and inhibition of telomerase activity. © 2018, Pleiades Publishing, Ltd

How to solve water shortage problem by means of renewable power generation?

The article is devoted to one of the global humanity problems-increasing drinking water shortage. The authors analyzed statistic data of Russian federal districts and emphasized the most problem regions. The authors proposed an innovative technology of renewable power sources as a way of water supply increasing; they analyzed perspectives of renewable power engineering in Russia according to solution of a fresh water shortage problem. Development of renewable power engineering was considered as one of the ways of water supply increasing. On the basis of the research the authors formulated an economic-mathematical model. The model assessed a capacity of a water condensing combined wind driven electric plant (WDEP) under the various weather conditions-An average temperature and humidity of the air. According to the model a perspective water output under the conditions of Republic of Crimea was foreseen. The authors came to the conclusion that a combined WDEP could be used for water supply in the further-flung regions, for agriculture, production and fire extinguishment. © 2018, Econjournals. All rights reserved