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
Ngày tải lên :
23/03/2014, 21:20
... exhibits an
unusually slow rate of oxidation by laccase from Polipo-
rus pinsitus, in spite of the fact that it is a phenol and
therefore a natural substrate for this phenoloxidase enzyme.
Nevertheless, ... least, a
stoichiometric amount is required in the most favourable
cases [10]. This might be because phenolic mediators are,
themselves, ÔgoodÕ substrates for the enzyme. Laccase would
oxidize them ... molecules [7], in that it does not need to be
present in large excess in order to obtain significant
conversion of laccase-resistant substrates. This favourable
feature 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
Ngày tải lên :
24/02/2014, 18:20
... 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
Ngày tải lên :
23/03/2014, 23:20
... 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 and
tapes.
Based on sales ... commercial/industrial inkjet printers as
that 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 stock
of 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
Ngày tải lên :
03/04/2014, 15:20
... 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
Ngày tải lên :
20/06/2014, 08:20
... lling suggested that the observed
increase in HIV incidence in homosexual men in some
Australian states might be explained by increasing rates
of other sexually transmissible infections [11]. These
models ... reduction in HIV
transmission risk in patients receiving cART through
reduced 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 to
2001 by a slow increase in incidence due to increasing
rates 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
Ngày tải lên :
20/06/2014, 23:20
... 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
Ngày tải lên :
21/06/2014, 08:20
... computational steps, visual areas extract from
their afferents increasingly complex features of the stimulus
theory. At the last levels, such features are by construction
complex enough to represent ... background clutter issues. The next section
summarizes the mechanisms of the human visual system for
visual object categorization in cluttered environments.
EURASIP Journal on Advances in Signal ... objects such as cups, umbrellas, and
ewers (note the different surface markings).
categorization. Until now, most researchers have focused
on 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
Ngày tải lên :
21/06/2014, 17:20
... 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 and
their formation mechanisms.
To clarify this issue, we used fructose as a model precur-
sor material to investigate ... interests [1-6]. In general, hydrothermal
treatment of saccharides produces water-soluble organic
substances and insoluble carbonaceous solids. The soluble
organic 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
Ngày tải lên :
22/06/2014, 22:20
... [4]. It is necessary to
introduce a sensitizer into the gel containing Sm
3+
ions
in order to obtain strong emission of Sm
3+
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 SnO
2
nanocrystals can sensitize the Sm
3+
emission in the
silica matrix. The one-step synthesis of the silica
xerogels ... are
dispersed in the silica matrix. These particles ought to
be assigned to SnO
2
nanocrystals (see the discussion
below).
Figure 2 exhibits the XRD pattern of the silica
xerogel containing Sm
3+
ions...
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Báo cáo y học: "Placenta Percreta-Induced Uterine Rupture Diagnosed By Laparoscopy in the First Trimester"
Ngày tải lên :
25/10/2012, 10:56
... 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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