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11.
The effect of pressure on the hydrolysis rates and the degradation kinetics of environmentally persistent omethoate pesticide was studied. The results showed that the values of kobs increased and the values of activation volume (AV) decreased with increasing pressure. Among pH conditions (3.58, 6.01 and 8.5), pH 8.5 was found to be the unstable condition and its half-life was reduced from 263 min at 1 atm to 19.37 min at 10 atm. These results describe that high-pressure hydrolysis is a useful technique for the conversion of toxic organic phosphorus into inorganic phosphorus. 相似文献
12.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｈｅａｖｙｍｅｔａｌｆｌｕｏｒｉｄｅｓｇｌａｓｓｅｓａｒｅｏｆｐｒｉｍａｒｙｉｎｔｅｒ ｅｓｔｆｏｒｉｍｐｏｒｔａｎｔａｐｐｌｉｃａｔｉｏｎｓｉｎｔｈｅｏｐｔｉｃａｌｃｏｍｍｕｎｉ ｃａｔｉｏｎｆｉｅｌｄ ,ｄｕｅｔｏｔｈｅｉｒｔｒａｎｓｐａｒｅｎｃｙｔｏｌｉｇｈｔｓｒａｎｇ ｉｎｇｆｒｏｍＵＶｔｏｉｎｆｒａｒｅｄｒｅｇｉｏｎｓ.Ｍｏｒｅｏｖｅｒ ,ｔｈｅｉｒｍｅ ｃｈａｎｉｃａｌｓｔｒｅｎｇｔｈｍａｋｅｓｔｈｅｍｇｏｏｄｃａｎｄｉｄａｔｅｓｆｏｒｗｉｎ ｄｏｗｓ,ｌａｓｅｒｈ… 相似文献
13.
Peter M. Fowler Darren J. Paul Gustavo Tomazoli Abdulaziz Farooq Richard Akenhead Lee Taylor 《European Journal of Sport Science》2017,17(9):1110-1118
The purpose was to assess sleep patterns, quantity and quality in adolescent (16.2?±?1.2 yr) Middle Eastern academy soccer players (n?=?20) and the influence of an intermission upon these characteristics. On a 17-day training camp (located one time zone west of home) including three discrete matches, sleep was assessed pre- (PRE) and post-match (POST) via wrist actigraphy. Retrospective actigraphy analysis identified sleep characteristics, including if players experienced a sleep intermission (YES) or not (NO) proximal to dawn, and bedtime (hh:mm), get-up time (hh:mm), time in bed (h), sleep duration (h) and sleep efficiency (%). Within YES two bouts were identified (BOUT1 and BOUT2). No differences were seen between PRE and POST, nor between BOUT1 and BOUT2 (p?>?.05). Overall players did not meet National Sleep Foundation (NSF) guidelines (7:04?±?1:16?h vs. recommended 8–10?h for 14–17 yr). Sleep duration was significantly reduced (～ ?13% or ?1:06) in YES compared to NO (6:33?±?1:05 vs. 7:29?±?1:17, p?<?.01). Despite players in YES waking earlier due to an intermission, they did not compensate for this with a later wake time, rising significantly earlier compared to NO (09:40?±?00:38 vs. 10:13?±?00:40, p?<?.05). These players on average do not obtain sufficient sleep durations relative to NSF guidelines, with decrements increased by an intermission proximal to dawn. High inter- and intra-individual variance in the players sleep characteristics indicates the need for individualized sleep education strategies and interventions to promote appropriate sleep. 相似文献
14.
M. Farooq Wahab 《Resonance》2009,14(10):996-1002
A functional monochromator model in a cardboard box, made from rotatable grating using a digital versatile disk is described
to highlight the working principles of a UV-Vis monochromator. The light source is a bright white LED and the colored bands
from the exit are displayed on the screen. The concept of absorption, complementary color, excitation and fluorescence, flame
emission spectrum, and wavelength dependence of light scattering can be visually shown in this model. With a minor modification,
one can use the same box to monitor flame emission spectrum of sodium and different light sources. As an optional activity,
the same properties are observed on a scanning spectrophotometer. 相似文献
15.
Farooq Sulehria 《亚洲交流杂志》2017,27(1):97-112
Mainstream discourses on the globalisation of media that delineate the emergence of privately owned television channels in the periphery country as evening out metropolitan domination are belied by concrete evidence. This essay argues that the rise of southern players has undermined state broadcasting rather than dismantling ‘media imperialism’. Based on two case studies, Pakistan Television (PTV) and Doordarshan (DD), this study demonstrates that the actual, if inadvertent, victim of globalisation has been state broadcasting and an associated developmentist model of television. As a result the decline of state-led television channels has radically transformed television systems in India and Pakistan. While DD and PTV view their audiences as citizens, the globalisation of media has resulted in a commodification of television audiences. Instead of public interest, audience maximisation has become the dominant logic of television systems in both these countries. In the process, developmentist television systems have been replaced by the commercially driven systems. 相似文献
16.
Umer Farooq Craig H. GanoeJohn M. Carroll Isaac G. CouncillC. Lee Giles 《Information processing & management》2008
Awareness has been extensively studied in human computer interaction (HCI) and computer supported cooperative work (CSCW). The success of many collaborative systems hinges on effectively supporting awareness of different collaborators, their actions, and the process of creating shared work products. As digital libraries are increasingly becoming more than just repositories for information search and retrieval – essentially fostering collaboration among its community of users – awareness remains an unexplored research area in this domain. We are investigating awareness mechanisms in CiteSeer, a scholarly digital library for the computer and information science domain. CiteSeer users can be notified of new publication events (e.g., publication of a paper that cites one of their papers) using feeds as notification systems. We present three cumulative user studies – requirements elicitation, prototype evaluation, and naturalistic study – in the context of supporting CiteSeer feeds. Our results indicate that users prefer feeds that place target items in query-relevant contexts, and that preferred context varies with type of publication event. We found that users integrated feeds as part of their broader, everyday activities and used them as planning tools to collaborate with others. 相似文献
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18.
Andrew Parker Haydn Morgan Samaya Farooq Ben Moreland Andy Pitchford 《Sport, Education and Society》2019,24(3):298-310
Numerous sport-based interventions exist which target marginalised or ‘at-risk’ young people with the intention of enabling some form of social change for programme participants. Very often, the objective of such interventions is the acquisition and development of qualities associated with ‘good citizenship’. However, critical scholars have noted how sport-based initiatives are frequently used as a form of social control, focusing on the development of personal responsibility. As such, these initiatives accentuate more passive forms of citizenship, as opposed to more active forms of citizenship towards which many educational policies and programmes are aimed. Nevertheless, there is a limited amount literature which explores the connection between sport-based interventions and citizenship development within marginalised or ‘at-risk’ youth populations. This paper presents findings from a small-scale, qualitative study of one such (football-based) intervention located in a number of inner-city boroughs of London, UK. Placing the accounts of programme participants and staff at the centre of the analysis, the paper: (i) uncovers the practicalities and nuances of football being utilised as a tool for social engagement, and (ii) explores broader notions of personal and behavioural development in relation to the acquisition of citizenship qualities. The paper concludes by suggesting that sporting activity may confer citizenship benefits for young people, but only when integrated into wider programmes of social support and community engagement. 相似文献
19.
S. F. Shaukat Ph. D. Ya-Ming Dong Ph. D. M. Hussain R. Farooq Guang-Yuan Li 《上海大学学报(英文版)》2002,6(1):45-49
Up-conversion processes for the blue, green and red emissions were found two-photon phenomenon, known as the cooperative phenomenon.
This phenomenon was assisted by Nd3+ → Yb3+ → Ho3+ energy transfer. The strong green emission due to the Ho3+ : (5F4, 5S2)→ 5I8 transitions was observed in Nd3+-Ho3+ co-doped ZrF4-based fluoride glasses under 800 nm excitation. As an attempt to enhance Ho3+ up-conversion luminescences in the Nd3+ – Ho3+ co-doped ZrF4-based glasses, Yb3+ ions were added to the glasses. As a result it was found that, in 800 nm excitation of 60 ZrF4. 30BaF2. (8-x)LaF3. lNdF3. xYbF3. 1HoF3 glasses (x=0 to 7), sensitized up-conversion luminescences are observed at around 490 nm (blue), 545 nm (green), and 650 nm (red), which
correspond to the Ho3+ : 5F3 → 5I8, ( 5F4, 5S2)→5I8 and 5F5→ 5I8 transitions respectively. The intensities of the green and red emissions in a 3 mol % YbF3-containing glass were about 50 times stronger than those glasses without YbF3. This is based on sensitization due to Yb3+ ions. In particular, the green emission was extremely strong and the Nd3+-Yb3+-Ho3+ co-doped ZrF4-based glasses have a high possibility of realizing a green up-conversion laser glass. In this paper the up-conversion mechanism
in the glasses is discussed in detail. 相似文献
20.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｃｈｅｍｉｃａｌｅｆｆｅｃｔｓｏｆｕｌｔｒａｓｏｕｎｄａｒｅｄｕｅｔｏｈｉｇｈｐｒｅｓｓｕｒｅｐｒｏｄｕｃｅｄｄｕｒｉｎｇｖｉｏｌｅｎｔｃｏｌｌａｐｓｅｏｆｃａｖｉｔａｔｉｏｎｂｕｂｂｌｅｓ.Ｔｈｅｒｅａｃｔｉｏｎｓｄｏｎｏｔｔａｋｅ ｐｌａｃｅｈｏｍｏｇｅ ｎｅｏｕｓｌｙｉｎｔｈｅｓｏｌｕｔｉｏｎｂｕｔｉｎ”ｈｏｔｓｐｏｔｓ”ｗｈｅｒｅｃａｖｉ ｔａｔｉｏｎｂｕｂｂｌｅｓｐｕｌｓａｔｅｏｒｃｏｌｌａｐｓｅ .Ｄｕｒｉｎｇｔｈｅａｄｉａｂａｔ ｉｃｃｏｍｐｒｅｓｓｉｏ… 相似文献