when were musical works first protected by copyright law in the u s
Báo cáo khoa học: First evidence of catalytic mediation by phenolic compounds in the laccase-induced oxidation of lignin models ppt
... exhibits anunusually slow rate of oxidation by laccase from Polipo-rus pinsitus, in spite of the fact that it is a phenol andtherefore a natural substrate for this phenoloxidase enzyme.Nevertheless, ... least, astoichiometric amount is required in the most favourablecases [10]. This might be because phenolic mediators are,themselves, ÔgoodÕ substrates for the enzyme. Laccase wouldoxidize them ... molecules [7], in that it does not need to bepresent in large excess in order to obtain significantconversion of laccase-resistant substrates. This favourablefeature of phenol red is shared by...
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Tài liệu ESP TARGET SITUATION NEEDS ANALYSIS: THE ENGLISH LANGUAGE COMMUNICATIVE NEEDS AS PERCEIVED BY HEALTH PROFESSIONALS IN THE RIYADH AREA docx
... design ESP courses, as is the case in register analysis, needs analysis aims to design ESP courses based on detailed empirical analysis of language situations in actual language use. In needs analysis, ... different countries. The Target-Situation Analysis and the Present-Situation Analysis are the two landmarks in needs analysis studies. Researchers continue to use one of these models as their theoretical ... graduate studies. The purpose of this study was to gather information about the language needs as perceived by these students and to explore the extent to which classroom instruction in the...
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Ele ctricity Use d by Office Equipment and Netw ork Equipment in the U.S.: Detailed Report and A ppendices ppt
... requirements for CPUs and the var ying number of CPUs used in minicomputers.2. The various kinds of peripherals associ ated with mi nicomputers such as external discs andtapes.Based on sales ... commercial/industrial inkjet printers asthat for desktop computers, since both are usually used individually.Daytime Status – We assumed that commercial/industrial inkjet printers are off during the daytime ... nonetheless estimate the stockof copier s by assuming that the average lifet ime of copiers is 6 year s. We did not need sales data for di splays, because we assum ed the stock of di splays is same...
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Báo cáo "Thermomechanical characteristics of rigid poly(vinyl chloride) crosslinked by a peroxide in the presence of trimethylolpropane trimethacrylate " pdf
... limits). III - RESULTS AND DISCUSSION Before studying thermomechanical charac-teristics of the crosslinked PVC samples in detail, it is necessary to investigate loads on the probe to select the ... crystallites, but can be changed by a chemical crosslinked network [5]. The crosslinking influences on the softening point (T s ) of the PVC samples in comparing with the uncrosslinked PVC samples (Table ... Glass transition temperature of the PVC samples crosslinked by DAPC and TMPTMA is higher than that of the uncrosslinked samples. It reflects an useful increase in service temperature of the...
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báo cáo hóa học:" Trends in detectable viral load by calendar year in the Australian HIV observational database" docx
... lling suggested that the observedincrease in HIV incidence in homosexual men in someAustralian states might be explained by increasing ratesof other sexually transmissible infections [11]. Thesemodels ... reduction in HIVtransmission risk in patients receiving cART throughreduced HIV viral load is being counterbalanced by increasing infection risk due to behavioural changes.Thi s underscores the ... but that this was followed in 1998 to2001 by a slow increase in incidence due to increasingrates of unprotected anal intercourse with casua l part-ners while use of cART remained fairly stable...
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Báo cáo hóa học: " First identification of primary nanoparticles in the aggregation of HMF" potx
... treatment of saccharides produces water-soluble organic substances and insoluble carbonaceous solids. The soluble organic substances have been the focus of early research, and understanding of the ... the surface and in the interior. The residual solution is found to contain a massive number of primary nanoparticles. The chemical structure of the carbonaceous spheres was characterised by ... all observations and analyses obtained in this study, we propose the following hypothesis as the formation mechanism of carbonaceous spheres from fructose under hydrothermal conditions, as schematically...
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Báo cáo hóa học: " Research Article Robust Object Categorization and Segmentation Motivated by Visual Contexts in the Human Visual System" docx
... computational steps, visual areas extract fromtheir afferents increasingly complex features of the stimulustheory. At the last levels, such features are by constructioncomplex enough to represent ... background clutter issues. The next sectionsummarizes the mechanisms of the human visual system forvisual object categorization in cluttered environments. EURASIP Journal on Advances in Signal ... objects such as cups, umbrellas, andewers (note the different surface markings).categorization. Until now, most researchers have focusedon how to minimize the intraclass variations caused by the...
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báo cáo hóa học:" First identification of primary nanoparticles in the aggregation of HMF" doc
... species. The continued growth in size of the cross-linked furanic species eventually results in the precipitation of the molecular clusters out of the solu-tion into the primary carbonaceous nanoparticles.These ... This statement well summarises the current state of understanding of the products andtheir formation mechanisms.To clarify this issue, we used fructose as a model precur-sor material to investigate ... interests [1-6]. In general, hydrothermaltreatment of saccharides produces water-soluble organicsubstances and insoluble carbonaceous solids. The solubleorganic substances ha ve been the focus...
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Báo cáo hóa học: " Enhancement of Sm3+ emission by SnO2 nanocrystals in the silica matrix" ppt
... [4]. It is necessary tointroduce a sensitizer into the gel containing Sm3+ions in order to obtain strong emission of Sm3+ions.Our previous study [5] showed that there existed the interaction ... CdS nanoparticles and rare earth ions. The present work aims to understand whether the SnO2nanocrystals can sensitize the Sm3+emission in the silica matrix. The one-step synthesis of the silicaxerogels ... aredispersed in the silica matrix. These particles ought tobe assigned to SnO2nanocrystals (see the discussionbelow).Figure 2 exhibits the XRD pattern of the silicaxerogel containing Sm3+ions...
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Báo cáo y học: "Placenta Percreta-Induced Uterine Rupture Diagnosed By Laparoscopy in the First Trimester"
... lower uterine segment; however, in cases of uterine rupture during the first trimester, the site commonly affected is the fundus, as noted in our patient [7]. The uterine ruptures in the first ... percreta-induced uterine rupture exhibits more vascularization than the site of previous scar-induced rupture; therefore, uterine rupture caused by placenta percreta can be more dangerous than ... Cesar-ean section [2]. Based on our review of medical literature, spontaneous uterine ruptures mainly occur during the second or third trimester; its occurrence in the first trimester is extremely...
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