400 research outputs found
n-Undecanyl 2-(4-bromoanilino)-4,4-dimethyl-6-oxocyclohex-1-enecarbodithioate
The six-membered cyclohexene ring in the title compound, C26H38BrNOS2, adopts an envelope conformation, with the C atom bearing the two methyl groups representing the flap. This atom deviates by 0.651 (3) Å from the plane passing through the other five atoms of the ring (r.m.s. deviation = 0.051 Å). The molecular conformation is stabilized by an N—H⋯S hydrogen bond. The title compound is isomorphous with n-undecanyl 2-(4-chloroanilino)-4,4-dimethyl-6-oxocyclohex-1-enecarbodithioate
2,3,4,6-Tetra-O-acetyl-β-d-galactopyranosyl 2-(2,4-dichloroanilino)-4,4-dimethyl-6-oxocyclohex-1-enecarbodithioate
The cyclohexene ring in the title compound, C29H33Cl2NO10S2, adopts an envelope conformation, with the C atom bearing the two methyl groups representing the flap. This atom deviates by 0.63 (1) Å from the plane through the other five ring atoms (r.m.s. deviation = 0.11 Å). The molecular conformation is stabilized by an intramolecular N—H⋯S hydrogen bond. The crystal studied was a non-merohedral twin, with a minor twin component of 29%
n-Undecanyl 2-(4-chloroanilino)-4,4-dimethyl-6-oxocyclohex-1-enecarbodithioate
The six-membered cyclohexene ring in the title compound, C26H38ClNOS2, adopts an envelope conformation, with the C atom bearing the two methyl groups representing the flap. This atom deviates by 0.642 (4) Å from the plane passing through the other five atoms of the ring (r.m.s. deviation = 0.053 Å). The molecular conformation is stabilized by an intramolecular N—H⋯S hydrogen bond
2-Hydroxyethyl 2-(2,4-dichloroanilino)-4,4-dimethyl-6-oxocyclohex-1-enecarbodithioate
The six-membered cyclohexene ring in the title compound, C17H19Cl2NOS2, adopts an envelope conformation, with the C atom bearing the two methyl groups representing the flap. This atom deviates by 0.716 (3) Å from the plane passing through the other five atoms of the ring (r.m.s. deviation = 0.072 Å). The molecular conformation is stabilized by an intramolecular N—H⋯S hydrogen bond. The hydroxy group engages in intermolecular O—H⋯O hydrogen bonding with adjacent acceptor atoms to generate a zigzag chain running along the c axis
n-Undecanyl 2-(2,4-dichloroanilino)-4,4-dimethyl-6-oxocyclohex-1-enecarbodithioate
The six-membered cyclohexene ring in the title compound, C26H37Cl2NOS2, adopts an envelope-shaped conformation, with the C atom bearing the two methyl groups representing the flap. This atom deviates by 0.658 (7) Å from the plane passing through the other five atoms of the ring (r.m.s. deviation = 0.005 Å). The molecular conformation is stabilized by an N—H⋯S hydrogen bond
Capability of the Invasive Tree Prosopis glandulosa Torr. to Remediate Soil Treated with Sewage Sludge
Sewage sludge improves agricultural soil and plant growth, but there are hazards associated
with its use, including high metal(loid) contents. An experimental study was conducted under
greenhouse conditions to examine the effects of sewage sludge on growth of the invasive tree
Prosopis glandulosa, as well as to determine its phytoremediation capacity. Plants were established
and grown for seven months along a gradient of sewage sludge content. Plant traits, soil properties,
and plant and soil concentrations of N, P, K, Cd, Pb, Cu, Ni, Zn, Cr, Co, As, and Fe were recorded.
The addition of sewage sludge led to a significant decrease in soil pH, and Ni, Co, and As concentrations,
as well as an increase in soil organic matter and the concentrations of N, P, Cu, Zn, and Cr. Increasing
sewage sludge content in the growth medium raised the total uptake of most metals by P. glandulosa
plants due to higher biomass accumulation (taller plants with more leaves) and higher metal
concentrations in the plant tissues. P. glandulosa concentrated more Cd, Pb, Cu, Zn, and Fe in its
below-ground biomass (BGB) than in its above-ground biomass (AGB). P. glandulosa concentrated Ni,
Co, and As in both BGB and AGB. P. glandulosa has potential as a biotool for the phytoremediation
of sewage sludges and sewage-amended soils in arid and semi-arid environments, with a potential
accumulation capability for As in plant leaves
Utjecaj osteogeničnih dodataka agregatu mineralnog trioksida na razinu genske ekspresije odontoblastičnih markera nakon zatvaranja pulpe u pasa.
This study investigates the effect of addition of dexamethasone, vitamin D3, or chitosan to mineral trioxide aggregate (MTA) on the gene expression level of dentin sialophosphoprotein (DSPP) and matrix extracellular phosphoglycoprotein (MEPE) after pulp capping in dogs. Pulp exposure was performed in sixty dogs’ teeth. The teeth were classified into 3 equal groups according to the evaluation period. Group 1:7 days, group 2: 21 days and group 3: 60 days. Each group was further subdivided according to the pulp capping material used, into subgroup A: MTA + dexamethasone, subgroup B: MTA + dexamethasone + vitamin D3, subgroup C: MTA + chitosan and subgroup D: MTA. According to the group, the pulps of the capped teeth were removed for analysis of the relative mRNA expression level of DSPP and MEPE using PCR. Statistical analysis of all data was performed. In subgroup A, significant expression was observed of DSPP (P≤0.05) in group 2 up to 18.8 relative fold change while in subgroup B a significant upregulated gene expression of DSPP (P≤0.05) up to 29.4 relative fold change was seen. Significant upregulated DSPP expression (P≤0.05) was recorded in groups 1 and 2 up to 6.9 and 3.6 relative fold change, respectively in subgroup C. In conclusion, dexamethasone, with or without vitamin D3 and chitosan, are synergistic odontogenic inducers with MTA for differentiation of dental pulp cells in dogs. The upregulation of DSPP is a good marker for this differentiation.Istraživan je utjecaj dodatka deksametazona, vitamina D3 ili hitozana agregatu mineralnog trioksida na razinu ekspresije gena za dentin-sijalofosfoprotein (DSPP) i gena za ekstracelularni matriks fosfoglikoprotein nakon zatvaranja pulpe u pasa. Pulpa je bila otvorena na 60 zuba. Ti su zubi bili razvrstani u tri jednake skupine ovisno o trajanju promatranja. Prva skupina bila je promatrana sedam dana, druga skupina 21 dan, a treća skupina 60 dana. Svaka skupina bila je podijeljena u podskupine ovisno o materijalu rabljenom za zatvaranje pulpe. Podskupini A bio je primijenjen agregat mineralnog trioksida + deksametazon, podskupini B bio je primijenjen agregat mineralnog trioksida + deksametazon + vitamin D3, podskupini C agregat mineralnog trioksida + hitozan, a podskupini D samo agregat mineralnog trioksida. Sukladno skupinama, pulpe zatvorenih zuba bile su uzete za analizu relativne ekspresije mRNA za dentin-sijalofosfoprotein i za ekstracelularni matriks fosfoglikoprotein PCR-om. Svi podatci bili su statistički obrađeni. Značajna ekspresija gena za dentinsijalofosfoprotein (P≤0,05) bila je dokazana u podskupini A druge skupine u relativnoj vrijednosti 18,8, dok je u podskupini B značajna ekspresija gena za dentin-sijalofosfoprotein (P≤0,05) bila 29,4 puta veća. Značajno povećana ekspresija DSPP (P≤0,05) u prvoj i drugoj skupini sve do 6,9 odnosno 3,6 puta ustanovljena je u podskupini C. Može se zaključiti da deksametazon (s vitaminom D3 ili bez njega) i hitozan djeluju sinergistički s agregatom mineralnog trioksida kao odontogenični pokretači za diferencijaciju stanica zubne pulpe u pasa. Povećana razina dentin-sijalofosfoproteina dobar je pokazatelj te diferencijacije
Evaluation of some functionalized imidazoles and 1,2,4-triazoles as antioxidant additives for industrial lubricating oils and correlating the results with the structures of additives using empirical AM1 calculations
AbstractFunctionalized 4,5-diphenyl-imidazoles, 4,5-diphenyl-1,2,4-triazoles and 5-(o-hydroxyphenyl)-4-phenyl-1,2,4-triazoles at the 2-position with thiol, thiomethyl and thiobenzyl groups, have been tested as antioxidant additives for lubricating oils. Whereas the thiomethyl groups in such compounds increased the antioxidant property than the thiol group, the corresponding thiobenzyl groups did the reverse. The results can be explained, based on correlating the electron donating and withdrawing abilities of the substituents with the oxidation stability. The triazoles carrying a phenolic hydroxyl group have more antioxidant power than those without such a group. The imidazoles gave the oils more oxidation stabilities than the two types of triazoles with the same functionalities. The 4,5-diphenyl-2-thiomethyl-imidazole (2), as an additive, has the highest antioxidant property, reaching the level of standard one when its concentration is 1.0% wt. instead of the 0.8% wt. of the standard. The correlation of the antioxidant character of the heterocyclic additives with their structures has been investigated using the semiempirical gas phase AM1 calculations for the studied heterocycles. The relative stability of the imidazoles 1 and 3 compared to 2 were in the order 2>1>3. Similarly, the relative stability of the triazoles are in the same order where 5>4>6 and 8>7>9
A Motion- and Sound-Activated, 3D-Printed, Chalcogenide-Based Triboelectric Nanogenerator
Cataloged from PDF version of article.A multilayered triboelectric nanogenerator (MULTENG) that can be actuated by acoustic waves, vibration of a moving car, and tapping motion is built using a 3D-printing technique. The MULTENG can generate an open-circuit voltage of up to 396 V and a short-circuit current of up to 1.62 mA, and can power 38 LEDs. The layers of the triboelectric generator are made of polyetherimide nanopillars and chalcogenide core-shell nanofibers. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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