dissociation constants of organic acids and bases
Cadmium mobilisation and plant availability the impact of organic acids
Ngày tải lên :
15/03/2014, 23:22
... the
impact of some organic acids on the uptake and trans-
location of root-absorbed Cd in various parts of maize
plants grown in sand and soil culture. The comparative
studies in soil and quartz sand ... the role of organic acids in modifying
the chemical nature of Cd supplied and its subsequent
uptakeby plants. Organicallyboundformsof Cd in the
presence of different organic (carboxylic and amino)
... of Cd from the Cd treatments with in-
creasing concentration of organic acids seems to be
the resultant of the interactions of Cd with organic lig-
ands resulting in the formation of mobile organically
bound...
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Bài giảng Chapter 15 Acids and Bases
Ngày tải lên :
28/11/2013, 01:12
... Approach 19
Brứnsted-Lowry Acids
ã
Brứnsted-Lowry acids are H
+
donors
any material that has H can potentially be a Brønsted-
Lowry acid
because of the molecular structure, often one H in the
molecule ... blood 7.3 to 7.4
egg whites 7.6 to 8.0
milk of magnesia (sat’d Mg(OH)
2
) 10.5
household ammonia 10.5 to 11.5
1.0 M NaOH 14
Chapter 15
Acids and
Bases
2011, NKMB Co., Ltd.
Chemistry, Julia Burdge, ... 20
Brứnsted-Lowry Bases
ã
Brứnsted-Lowry bases are H
+
acceptors
any material that has atoms with lone pairs can
potentially be a Brønsted-Lowry base
because of the molecular structure, often one...
- 136
- 390
- 0
Tài liệu THE VOCABULARY AND CONCEPTS OF ORGANIC CHEMISTRY pptx
Ngày tải lên :
13/12/2013, 16:15
... edition. One
of the most obvious of these is in the title, which has been expanded to The
Vocabulary and Concepts of Organic Chemistry in recognition of the fact that in
addressing the language of a ... the overlap of a carbon sp
3
orbital and a hydrogen 1s orbital. Each bond is a
result of the pairing of two electrons, one from each of the bonded atoms, and the
electron density of the shared ... up of the 2s,2p
x
,2p
y
,
and 2p
z
orbitals; and the shell when n ϭ 3 is the M shell consisting of the 3s, the three
3p orbitals, and the five 3d orbitals. Although the origin of the use of the...
- 900
- 706
- 2
Tài liệu Risk Characterization, Assessment, and Management of Organic Pollutants in Beneficially Used Residual Products pdf
Ngày tải lên :
14/02/2014, 03:20
... Assessment, Of-
Webber, M.D., H.R. Rogers, C.D. Watts, A.B.A. Boxall, R.D. Davis,
fice of Res. and Development, Washington, DC.
and R. Scoffin. 1996. Monitoring and prioritisation of organic con-
USEPA. ... Taylor
ABSTRACT
lulose, and other organic materials that make up living
plant and animal matter (Li et al., 2001). Additionally,
A wide array of organic chemicals occur in biosolids and other
some volatile organic ... exposure and
risk to farmers (and their families) who apply biosolids data gaps in critical areas limit the accuracy of risk
assessments. Risk assessments for PCBs and dioxin andto their land and...
- 11
- 657
- 1
Tài liệu CONSUMER PREFERENCE AND CONSUMPTION OF ORGANIC PRODUCTS IN THE EASTERN CAPE PROVINCE OF SOUTH AFRICA docx
Ngày tải lên :
14/02/2014, 03:20
... confidence of the product and is an indication of the
trust of the organic label.
12. Conclusion
This paper has established the growing importance of organic products in the food system of the ... perceptions and attitudes regarding organic
products;
ã To identify the factors that affect the consumer’s preference and consumption
of organic products.
3. The Model and Methods
A sample of 200 ... was drawn randomly from rural and urban locations in the
two main regions of the Eastern Cape, namely the former Transkei homeland area and the
former Ciskei homeland area. By means of structured...
- 28
- 586
- 0
Tài liệu CONTROL OF ORGANIC COMPOUND EMISSIONS FROM CHEMICAL, COATINGS AND RUBBER PRODUCTS MANUFACTURING pdf
Ngày tải lên :
14/02/2014, 08:20
... control device or the cost of
replacement of part of the control device exceeds 50% of the cost
of replacing the entire control device with a control device that is
capable of complying with the respective ... documentation is to
include a description of the equipment that leaked, date of detec-
tion, date of repair, dates of follow−up inspection, and an explana-
tion of what caused the leak. This documentation ... chem-
ical listed in Table A−1 of Appendix A of Control of Volatile
Organic Compound Emissions from Reactor Processes and Dis-
tillation Operations Processes in the Synthetic Organic Chemical
Manufacturing...
- 6
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- 0
Tài liệu Investigation of Organic Chemicals Potentially Responsible for Mortality and Intersex in Fish of the North Fork of the Shenandoah River, Virginia, during Spring of 2007 ppt
Ngày tải lên :
14/02/2014, 08:20
... E.T., and Holmes, J., 2008, Investiga-
tion of organic chemicals potentially responsible for mortality and intersex in fish of the North Fork of the Shenandoah
River, Virginia, during spring of ... Investigation of Organic Chemicals in the North Fork of the Shenandoah River, Virginia, Spring 2007
Table 3. Estimated water concentrations and identification of select agricultural herbicides and pesticides ... Laboratory
4
Friends of the North Fork of the Shenandoah River
Prepared in cooperation with the Friends of the North Fork of the Shenandoah River
Open-File Report 2008–1093
U.S. Department of the Interior
U.S....
- 24
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- 0
Tài liệu Nonequilibrium transport and sorption of organic chemicals during aquifer remediation doc
Ngày tải lên :
14/02/2014, 08:20
... layer of fine silty sand mixed with clay with a thickness of about 15 m.
Below that is a layer of fine and coarse sand with a thickness of 120 m.
surface 1.5m ab
fine sand
silty sand
and clay ... m
fine and
coarse sand
Fig. 5 Overview of the subsoil
The extent and degree of soil and groundwater contamination have been
investigated in several phases of drilling, sampling and analysing. ... top of the silty sand and clay layer (Fig. 5). About 3500 m
3
of soil in the
unsaturated zone and the upper part of the phreatic aquifer have been contaminated
with approximately 400 kg of...
- 20
- 478
- 0
Tài liệu PHYSICAL AND CHEMICAL ASPECTS OF ORGANIC ELECTRONIC doc
Ngày tải lên :
16/02/2014, 19:20
... gate electrode [11, 12], and the particular nature of the
organic/ inorganic interfaces.
The analysis of OFET device characteristics allows many of the key prob-
lems in organic electronics to be ... various aspects of OFETs, in-
cluding the synthesis of new materials, preparation and characterisation of or-
ganic thin films, characterisation of device properties and the development of
new device ... orientation of the molecules.
(ii) Processability of Organic Compounds for Applications
in Organic Electronics
In general, for the realisation of OFETs two classes of materials are available:
polymers and...
- 733
- 2.7K
- 1
Tài liệu Báo cáo khoa học: Modulation of cyclin D1 and early growth response factor-1 gene expression in interleukin-1b-treated rat smooth muscle cells by n-6 and n-3 polyunsaturated fatty acids pdf
Ngày tải lên :
19/02/2014, 16:20
... action of EPA and DHA (Eur. J. Biochem. 271) 4471
Modulation of cyclin D1 synthesis and
hyperphosphorylation of Rb by n-3 and n-6 PUFAs
Induction of cyclin D1 is one of the e arliest effects of
mitogenic ... contribute to the modu-
lation of egr-1 gene expression (Fig. 4B).
Effects of n-3 and n-6 PUFAs on the synthesis
of caveolin-1 and caveolin-3 and on the location
of p42/44 MAPK caveolae
Caveolins ... the
production of PGE2 [18]. The inhibition of PGE2 release
was the consequence of a reduction of COX-2 and secretory
PLA2 mRNA expression. Moreover, the IL-1 b-induced
expression of secreto ry...
- 12
- 499
- 0
Tài liệu PRINCIPLES AND PRACTICES OF ORGANIC LETTUCE SEED PRODUCTION IN THE PACIFIC NORTHWEST potx
Ngày tải lên :
21/02/2014, 21:20
... sprouting of seeds in the seed
heads, and encourage discoloration and diseases
of the seed.
Higher temperatures and the longer daylength of
summer often accelerate flower initiation and
bolting ... sold
and planted in these regions. Outside of these
production areas small amounts of LMV may not
be a production issue of economic importance and
the level of scrutiny in management of this ... lettuce plants or weeds, and on
the number and activity of aphids.
A number of steps can be taken to manage the
spread of LMV. The first step in is to reduce the
chance of initial infection....
- 12
- 553
- 0
ANALYSIS OF NAMES OF ORGANIC CHEMICAL COMPOUNDS BY USING PARSER COMBINATORS AND THE GENERATIVE LEXICON THEORY doc
Ngày tải lên :
05/03/2014, 20:20
...
to Organic Chemistry terminology. The abilities of analysing and correcting the ambiguities of
the inadequate names and of using an optimized extension of Xymtec to represent the pictures of ... generated by the command \tetrahedral
The macros \rtrigonal and \ltrigonal are used to draw right-handed and left-handed trigonal
units, respectively. For instance, the commands below output the ... Research and
Education Association.
[10] P. Ertl. (2003) Cheminformatics analysis of organic substituents: Identification of the most
common substituents, calculation of substituent properties, and...
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- 541
- 0
THE MANUFACTURING AND APPLICATION OF ORGANIC COMPOUND FERTILIZERS pot
Ngày tải lên :
05/03/2014, 20:20
... control of
organic compound fertilizer and of compost
are of critical importance. National standards
for factories and for the quality and prices of
products, should be set by the government,
and ... center, east and south
of the island, respectively. They compared
the effect of two organic compound fertilizers
and two chemical fertilizers on the spring and
autumn tobacco crop. The organic compound
fertilizers ... Effect of compound and organic fertilizers on rice yields at three lowland sites,
central Taiwan
REFERENCES
Botha, A.D.P 1982. Report on a study tour
of the United States of America. Institute
of...
- 9
- 538
- 0
Báo cáo khóa học: O-acetylation and de-O-acetylation of sialic acids in human colorectal carcinoma docx
Ngày tải lên :
07/03/2014, 14:20
... Research, Department of Bio -Organic Chemistry, Section of Glycoscience and
Biocatalysis, Utrecht University, the Netherlands
A decrease in the level of O-acetylated sialic acids observed in
colorectal ... (1989) O-acetylation
and de-O-acetylation of sialic acids. O-acetylation of sialic acids in
the rat liver Golgi apparatus involves an acetyl intermediate and
essential histidine and lysine residues–a ... (1993) High level O-acetylation of
sialic acids on N-linked oligosaccharides of rat liver membranes.
Differential subcellular distribution of 7- and 9-O-acetyl groups
and of enzymes involved in their...
- 10
- 458
- 0
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