521 research outputs found
Nitrogen-Doped Carbonaceous Materials for Removal of Phenol from Aqueous Solutions
Carbonaceous material (brown coal) modified by pyrolysis, activation, and enrichment in nitrogen, with two different factor reagents, have been used as adsorbent of phenol from liquid phase. Changes in the phenol content in the test solutions were monitored after subsequent intervals of adsorption with selected adsorbents prepared from organic materials. Significant effect of nitrogen present in the adsorbent material on its adsorption capacity was noted. Sorption capacity of these selected materials was found to depend on the time of use, their surface area, and pore distribution. A conformation to the most well-known adsorption isotherm models, Langmuir, and Freundlich ones, confirms the formation of mono- and heterolayer solute (phenol) coverage on the surface of the adsorbent applied herein. The materials proposed as adsorbents of the aqueous solution contaminants were proved effective, which means that the waste materials considered are promising activated carbon precursors for liquid phase adsorbents for the environmental protection
Daphniola Radoman, 1973 (Caenogastropoda: Truncatelloidea) at east Aegean Islands
Shell habitus and COI mitochondrial gene sequences of one freshwater snail from Khios and three from Rhodes islands were analysed. Both methods confirmed assignment of these specimens to the genus Daphniola Radoman, 1973. Genetic distance between individuals from these two islands is surprisingly low, strongly suggesting that they belong to the same species, still undescribed. Comparison of COI sequences with other known species of this genus shows that the closest relative of the Khios and Rhodes populations is D. louisi Falniowski et Szarowska, 2000 from Attica. The results are discussed in the context of geological and climatic history of the Mediterranean
Pseudorientalia Radoman, 1973 (Caenogastropoda: Rissooidea) on Samos Island, Aegean Sea
Pseudorientalia Radoman, 1973 is recorded from the Samos Island (East Aegean Islands). The genus was previously known from northern Turkey. The shells, protoconch, radula, penis, and female reproductive organs are described. All the morphological data confirm that the specimens belong to the genus Pseudorientalia, but for the moment its identity with P. natolica (KĂŒster, 1852) from Turkey cannot be confirmed. Molecular data (mitochondrial cytochrome oxidase subunit I and nuclear 18S rRNA gene partial sequences) confirm the genus-level distinctness of Pseudorientalia, and its sister clade consists of Grossuana Radoman, 1973, Trichonia Radoman, 1973, and Daphniola Radoman, 1973
Article ID 297654
Carbonaceous material (brown coal) modified by pyrolysis, activation, and enrichment in nitrogen, with two different factor reagents, have been used as adsorbent of phenol from liquid phase. Changes in the phenol content in the test solutions were monitored after subsequent intervals of adsorption with selected adsorbents prepared from organic materials. Significant effect of nitrogen present in the adsorbent material on its adsorption capacity was noted. Sorption capacity of these selected materials was found to depend on the time of use, their surface area, and pore distribution. A conformation to the most well-known adsorption isotherm models, Langmuir, and Freundlich ones, confirms the formation of mono-and heterolayer solute (phenol) coverage on the surface of the adsorbent applied herein. The materials proposed as adsorbents of the aqueous solution contaminants were proved effective, which means that the waste materials considered are promising activated carbon precursors for liquid phase adsorbents for the environmental protection
Nowotworowe zapalenie opon mĂłzgowo-rdzeniowych â opis dwĂłch przypadkĂłw
Do zajÄcia opon mĂłzgowo-rdzeniowych, okreĆlanego rĂłwnieĆŒ jako meningoza lub karcynomatoza opon, dochodzi u 5â8% pacjentĂłw z chorobami nowotworowymi. Przerzuty do opon miÄkkich wystÄpujÄ
w przebiegu zĆoĆliwych nowotworĂłw ukĆadu krwiotwĂłrczego,raka sutka, raka pĆuca, czerniaka i gruczolakorakĂłw przewodu pokarmowego. Meningoza przebiega pod postaciÄ
rakowatoĆci opon i rdzenia krÄgowego lub nowotworowego zapalenia opon mĂłzgowo-rdzeniowych, ktĂłre rĂłĆŒniÄ
siÄ przebiegiem klinicznymi rokowaniem. CharakterystycznÄ
cechÄ
nowotworowego zapalenia opon mĂłzgowo-rdzeniowych jest jednoczesne, wielopoziomowe wystÄpowanie objawĂłw klinicznych wynikajÄ
cych z zajÄcia kilku obszarĂłw ukĆadu nerwowego. Ćredni czas przeĆŒycia pacjentĂłw z nowotworowym zapaleniem opon mĂłzgowo-rdzeniowych wynosi 4â11 tygodni. Mimo postÄpu diagnostyki i leczenia onkologicznego w ostatnich kilkudziesiÄciu latach czas ten nie ulegĆ wydĆuĆŒeniu. Autorzy przedstawili opisy dwĂłch pacjentĂłw z nowotworowym zapaleniem opon mĂłzgowo-rdzeniowych (w przebiegu czerniaka i raka pĆuca)
Idiopatyczne nadciĆnienie ĆrĂłdczaszkowe u mĆodej kobiety bez nadwagi
Idiopatyczne nadciĆnienie ĆrĂłdczaszkowe to stan charakteryzujÄ
cysiÄ wzmoĆŒonym ciĆnieniem prawidĆowego pĆynu mĂłzgowo-rdzeniowego(> 250 mm H2O), ktĂłremu nie towarzyszy inny procespatologiczny toczÄ
cy siÄ w ukĆadzie nerwowym lub poza nim.W rozwaĆŒaniach nad patogenezÄ
schorzenia bierze siÄ pod uwagÄmiÄdzy innymi rolÄ ĆŒeĆskich hormonĂłw pĆciowych, otyĆoĆci,nadkrzepliwoĆci krwi oraz zaburzeĆ krÄ
ĆŒenia pĆynu mĂłzgowo--rdzeniowego. WiÄkszoĆÄ chorych z idiopatycznym nadciĆnieniemĆrĂłdczaszkowym skarĆŒy siÄ na obustronny bĂłl gĆowy. Podstawowym,obiektywnym objawem schorzenia jest obrzÄk tarcz nerwĂłwwzrokowych, ktĂłry w przypadku dĆugotrwaĆego utrzymywaniasiÄ prowadzi do uszkodzenia nerwĂłw wzrokowych i zaburzeĆwidzenia. Dlatego konieczna jest regularna kontrola okulistycznaz ocenÄ
dna oka, badaniem ostroĆci wzroku, pola widzeniai rozrĂłĆŒniania barw. Leczenie idiopatycznego nadciĆnienia ĆrĂłdczaszkowegoobejmuje redukcjÄ masy ciaĆa, stosowanie lekĂłwzmniejszajÄ
cych wytwarzanie pĆynu mĂłzgowo-rdzeniowego orazpostÄpowanie neurochirurgiczne. Autorzy przedstawiajÄ
mĆodÄ
chorÄ
bez nadwagi z przygodnie rozpoznanym idiopatycznymnadciĆnieniem ĆrĂłdczaszkowym
Differential cross section measurements for the production of a W boson in association with jets in protonâproton collisions at âs = 7 TeV
Measurements are reported of differential cross sections for the production of a W boson, which decays into a muon and a neutrino, in association with jets, as a function of several variables, including the transverse momenta (pT) and pseudorapidities of the four leading jets, the scalar sum of jet transverse momenta (HT), and the difference in azimuthal angle between the directions of each jet and the muon. The data sample of pp collisions at a centre-of-mass energy of 7 TeV was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 5.0 fb[superscript â1]. The measured cross sections are compared to predictions from Monte Carlo generators, MadGraph + pythia and sherpa, and to next-to-leading-order calculations from BlackHat + sherpa. The differential cross sections are found to be in agreement with the predictions, apart from the pT distributions of the leading jets at high pT values, the distributions of the HT at high-HT and low jet multiplicity, and the distribution of the difference in azimuthal angle between the leading jet and the muon at low values.United States. Dept. of EnergyNational Science Foundation (U.S.)Alfred P. Sloan Foundatio
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