College of Arts & Sciences: المرسلات الحديثة
السجلات المعروضة 121 -- 140 من 3638
-
Synthesis and Spectroscopic Studies of the Charge‐Transfer Complexes of 2,3‐Diaminopyridine and π‐Electron Acceptors
( Taylor and Francis Ltd. , 2004 , Article)The spectrophotometric properties of the charge transfer (CT)‐complexes formed between 2,3‐diaminopyridine (DAPY) and π‐acceptors tetrachloro‐p‐benzoquinone (chloranil) and tetracyanoethylene (TCNE) have been studied in ... -
Preparation and infrared spectra of (Cu(O)(H2O)3) and (Cu2(O) (C1)2(H2O)2) complexes formed in the reactions of Cu(II) salts with urea
( Elsevier , 1989 , Article)The preparation and characterization of the new solid complexes (Cu(O)(H2O)3) and (Cu2(O)(Cl)2(H2O)2) formed in the reaction of urea with CuSO4 · 5H2O and CuCl2 · 2H2O, respectively, in aqueous media at ~75°C are reported. ... -
Resonance Raman and far infrared spectroscopic studies of triiodide complexes formed in the reaction of iodine with some polycyclic amines
( Elsevier , 1989 , Article)The solid charge transfer complexes formed in the reaction of iodine with the polycyclic amines 1,4,8,12-tetraazacyclopentadecane (TACPD) and meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (HMTACTD) have ... -
Synthesis and infrared spectra of alkaline earth metal carbonates formed by the reaction of metal salts with urea at high temperature
( Indian Academy of Sciences , 2004 , Article)The metal carbonate, MCO3 (M = Ca, Sr and Ba), was synthesized by a novel method of reacting aqueous solution of each of Ca2+, Sr2+ and Ba2+ salts with urea at high temperature, ∼ 80°C. The reaction products were characterized ... -
Synthesis and spectroscopic studies of metal complexes formed in the reaction of metal ions with urea at high temperature
( Korean Chemical Society , 2007 , Article)Urea reacts with PtCl2, H2[PtCl6]·6H2O, H2[IrCl6] and Ni(CH3CO2)2 in aqueous solution at high temperature (60-80 °C) yielding [PtCl2(Urea)]·2H2O (1), (NH4)2[PtCl6] (2), (NH4)2[IrCl6]·H2O (3) and [Ni2(OH)2(NCO)2(H2O)2] (4) ... -
Resonance Raman studies of the peroxotitanate(IV) complexes K2(Ti(O2)(SO4)2).5H2O and K2(Ti(O2)(C2O4)2).3H2O
( Elsevier , 1986 , Article)The resonance Raman spectra of K2(Ti(O2)(SO4)2)·5H2O and K2(Ti(O2)(C2O4)2)·3H2O are recorded. The results are consistent with the triangular structure of the peroxotitanium unit, Ti(O2), with C2ν symmetry. The ν(OO), ... -
Resonance Raman and far-infrared studies of charge-transfer complexes of iodine
( John Wiley and Sons Inc , 1986 , Article)The reactions of I2 with phenazine (PH), acridine (AC) and hexamethylenetetramine (HMTA) have been investigated by resonance Raman and far-infrared spectroscopy. The results indicate that the species (PH)2I+I3−, (AC)2I+I3− ... -
Vibrational analysis of the trigonal bipyramidal NbCl5 and NbBr5 molecules
( Elsevier , 1986 , Article)Vibrational normal coordinate analysis has been made for NbCl5 and NbBr5 molecules with D3h symmetry and using Wilson's GF matrix method. The observed frequencies are quantitatively assigned on the basis of the calculated ... -
Spectroscopic studies on the reaction of iodine with the mixed oxygen-nitrogen cyclic base 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8,8,8] hexacosane
( Chemical Publishing Co. , 2005 , Article)The interaction of the mixed oxygen-nitrogen cyclic base, 4,7,13,16,21,24-hexaoxa-1,10- diazabicyclo[8,8,8] hexacosane (HODABCHC) with iodine as a s-acceptor has been studied spectrophotometrically at room temperature in ... -
Synthesis and characterization of oxovanadium(IV) urea compound
( Chemical Publishing Co. , 2005 , Article)Vanadyl chloride, VOCl2.6H2O, reacts with urea at room temperature to form the four coordinated oxovanadium(IV) complex of the type [V(O)(urea)2(Cl)2]. The complex is in the mononuclear form where the two urea molecules ... -
Real-Time Colonic Disease Diagnosis with DRL Low Latency Assistive Control
( Institute of Electrical and Electronics Engineers Inc. (IEEE) , 2024 , Article)In recent years, there has been a growing interest in endoscope automation and assisted control methods, with the primary objective of minimizing human error and associated stress. One critical challenge in the implementation ... -
Eight weeks of plyometric training improves ability to change direction and dynamic postural control in female basketball players
( Frontiers Media S.A. , 2019 , Article)The aim of this study was to examine the effects of 8 weeks of plyometric training on the ability to change direction and postural control in female basketball players. 25 national level female basketball players aged 18-27 ... -
Effects of short-term resistance training and tapering on maximal strength, peak power, throwing ball velocity, and sprint performance in handball players
( Public Library of Science , 2019 , Article)The purpose of this study was to assess the effect of short-term resistance training and two weeks of tapering on physical performances in handball players. Following a ten-week progressive resistance training program, ... -
Correction: Effects of short-term resistance training and tapering on maximal strength, peak power, throwing ball velocity, and sprint performance in handball players (PLoS One (2019) 14:7 (e0214827) DOI: 10.1371/journal.pone.0214827)
( Public Library of Science , 2019 , Article)The following information is missing from the Funding statement: The publication of this article was funded by the Qatar National Library. No additional external funding was received for this study. The histograms are ... -
Effects of an 8-Week In-Season Upper Limb Elastic Band Training Programme on the Peak Power, Strength, and Throwing Velocity of Junior Handball Players
( Georg Thieme Verlag , 2019 , Article)Background Team handball is an intense sport with special requirements on technical and tactical skills as well as physical performance. The ability of handball players to make repeated powerful muscular contractions in ... -
Relationships between maximal strength of lower limb, anthropometric characteristics and fundamental explosive performance in handball players
( Georg Thieme Verlag , 2019 , Article)Background The purpose of this study was to examine relationships between lower body muscular strength, anthropometric characteristics and several measures of explosive performance in elite team-handball players. Methods ... -
Relationships between olympic weightlifting exercises, peak power of the upper and lower limb, muscle volume and throwing ball velocity in elite male handball players
(2019 , Article)Background This study aimed to investigate relationships between peak power (PP) as measured by upper limb (PPUL) and lower limb (PPLL) force velocity tests, maximal upper limb force assessed by clean and jerk (1RMCJ) and ... -
Qatar vs. Germany: An analysis of Qatari reactions to western discursive othering during the 2022 FIFA World Cup
( Intellect , 2024 , Article)Massive sports events always attract international attention. However, for attention-seeking countries, this is a double-edged sword because it is difficult to remain in control of the images produced by foreign media ... -
Resistance training and handball players’ isokinetic, isometric and maximal strength, muscle power and throwing ball velocity: A systematic review and meta-analysis
( MDPI AG , 2020 , Article)Purpose: Handball (Team Handball) is an intermittent and strenuous contact sport, the successful performance of which depends on frequent body contacts, and the ability to make repeated explosive muscular contractions ... -
Effects of Elastic Band Based Plyometric Exercise on Explosive Muscular Performance and Change of Direction Abilities of Male Team Handball Players
( Frontiers Media S.A. , 2020 , Article)This study examined the effects of incorporating 8 weeks of bi-weekly lower limb elastic band based loaded plyometric training into the in-season regimen of junior handball players. Participants were assigned between control ...
