determination of vitamin e tocopherols and tocotrienols

... reduced pressure at room temperature until ethanol and methanol were removed followed by drying in a freeze-dryer. The dry extracts (extractable phytochemicals) represented 24.8% of the rice germ ... curves of their structure- related standards when their corresponding standards were not available. Results are means ( standard deviation (SD) for at least three replicate determinations. RESULTS ... the broken germ. In summary, we analyzed free vitamin E and γ-oryzanol components in RG and FFRB. The profiles of free vitamin E and γ-oryzanol in RG and FFRB differ significantly. The levels of...

Ngày tải lên: 15/03/2014, 15:33

Ngày tải lên: 12/08/2014, 18:22

... measurable trNOE effects. This is most likely due to slow exchange between the bound and the free state. For dimers and pentamers of the MUC-1 tandem repeat [16], i .e. 40mer and 60mer peptides, ... roughout the mole- cule we chose to reference distances to reference atom pairs in the same segment, i .e. distances between protons of Asp2, Fig. 4. trNOE build-up rates of PDTRP in presence of SM3 ... correlation time, i .e. have very different degrees of freedom, or (b) the NOE between the Asp2 b protons is relayed by a protein proton. Neither explanation can easily be proven. It is, however,...

Ngày tải lên: 21/02/2014, 15:20

Ngày tải lên: 16/03/2014, 13:20

Ngày tải lên: 23/03/2014, 21:20

Ngày tải lên: 05/09/2013, 08:40

... requirements of Class E testing. Software upgrades are the mechanism used to keep the tester up to date with accuracy and performance requirements. These testers are complicated instruments and each manufacturer ... and PM01. Field Performance Testing V15 060508 Page 3 of 11 2. Passive Testing With Hand-Held Field Testers There are currently three levels of hand-held field tester: Level 2e – for testing up ... Class E Warranty Testing Using Cat 6 Components After testers have been in the field for some time, handling and maintenance issues can arise from extended use. The Level 3 & 4 testers need...

Ngày tải lên: 12/12/2013, 12:15

... entrepreneurship, indeed, better-educated immigrants are more likely to be business owners: 5.4 percent of immigrants with a college degree or more are business owners, compared to 2.8 percent ... unincorporated self-employed are a large number of people who would not generally be considered busi- ness owners. A substantial share of the un- incorporated self-employed are freelance workers, independent ... have been here longer are more likely to own businesses As immigrants develop roots and become more established in the United States, they become correspondingly more likely to own a business....

Ngày tải lên: 18/02/2014, 00:20

... Department of Pathology and Laboratory Medicine and the Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN, USA 5 Department of Pharmacology and the Center ... Biomedical and Chemical Sciences, The University of Western Australia, Crawley, Australia 2 Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, ... produce 20a,22R-dihydroxycholesterol as an intermediate, is a prerequisite for cleavage of the bond between C20 and C22 [1,14]. Another difference between the metabolism of vitamin D3 and cholesterol by P450scc...

Ngày tải lên: 18/02/2014, 17:20

... unique source of diverse oligosaccha- rides, and more than 80 have been isolated and sequences assigned [6]. Many of these structures are closely related to the carbohydrate chains of glycoproteins ... fragment ions are apparent, it can be deduced that the disaccharide sequence on the 3-branch shares the same terminal sequence Gal1–3GlcNAc Taken together, these features indicate iLNO to be: MFiLNO. ... are given in Table 2. Anomeric proton chemical shifts of four Gal residues are present between 4.47 and 4.427 p.p.m., while those of GlcNAc are between 4.71 and 4.634 p.p.m. The reducing terminal...

Ngày tải lên: 19/02/2014, 12:20

... structures. The structures of the N-glycans of nLyc e 2 and their molecular percentages are presentec in Table 2. The peptide analysis of nLyc e 2 identified 21 peptides of the natural allergen. One of ... histamine release experi- ments; to date our results give strong evidence for the allergenic activity of the carbohydrates in a subgroup of tomato allergic patients. Therefore the presence of highly ... reaction, i .e. specific degranulation of basophils. The protein backbone of the allergen does not seem to play a role because the recom- binant protein did not induce the mediator release even...

Ngày tải lên: 21/02/2014, 00:20

... business. As the term has become ever- more widespread, a wide range of descriptive and normative meanings have been associated with the term. Perhaps the most immediate meaning of e- government, which ... were also examined. Taken together, this evidence base provided a rich and in-depth under- standing of each e- government project. The transcriptions of interviews and the documentary data were ... News, while the first entry of the truncated version, e- commerce’, is December 1994 in PC Week. The application of the prefix ‘electronic’ and the truncated e to denote internet-based activity...

Ngày tải lên: 06/03/2014, 06:21

... ± SEM, are expressed as percent- age of the value obtained with incubation of Hpt alone. In each panel, a single representative of at least three independent experi- ments is shown. The interassay ... novel link between the acute phase of inflam- mation and ApoE function that should be considered when the effects of either protein are investigated. Experimental procedures Materials Chemicals of ... obtained by incu- bation of Hpt alone, and expressed as mean ± SEM. In each panel, a single representative of at least three independent experiments is shown. The interassay coefficient of variation...

Ngày tải lên: 07/03/2014, 00:20

... not depend on the pH at which the activity assays were carried out. Indeed, k cat and K l-Glu values were determined between pH 6.5 and 8.5 in the presence of fixed concentrations of the other substrates (Fig. ... discrepancy v 2 (normalized sum of the reduced standard deviations) between the linear superposition of the weighted intensities of the components and the experimental data from the mixture. GluRS ⁄ GluTR interaction Rv0509 ... be  20- fold higher for Mt-GluRS than for the E. coli enzyme. Such a difference cannot be ascribed to a different pH dependence of the reaction, but rather to a difference between the enzymes. Like...

Ngày tải lên: 07/03/2014, 03:20

... eukary- otic cell [22]. Therefore, we tested the effect of the replicative state of the cell on the interaction between Pol e and RNA pol II. A possible confinement of the interaction to late G 1 and S ... poly(viny- lidene difluoride) membrane (Millipore, Espo, Finland). Proteins were detected using chemiluminescence reagents (Pierce). Antibodies GIA, E2 4C and H3B, or N20 were used for the detection of Pol e ... (mouse IgG). Precipitates were treated with calf intestinal phosphatase (CIP) where indicated and RNA pol II was detected as described in Experimental procedures. Whole-cell extract (WCE) represents...

Ngày tải lên: 07/03/2014, 11:20

... lm) overnight and analyzed as previously. The same relative abundances of the free and bound enzymes were observed with either 10 min or the extended incubation periods within the error level of ... complex, and [P] and [L] are the concentrations of the free protein and free ligand (i .e. inhibitor), respect- ively [68]. Expressed in terms of r, defined as the num- ber of ligands bound to one ... different charge states can represent different binding patterns, reflecting different conformations [60]. The intensities used for these calculations were therefore summed over the charge state...

Ngày tải lên: 07/03/2014, 17:20

... sample starts to melt. When gases build up, it may be necessary to tilt the U-tube to release the gases. e. Repeat the freeze and degas process once, reducing pressure each time to less than ... fixed gas pressure. The vapor pressure’s dependence on absolute temperature is represented by an Antoine expression, and the fixed gas as pressure is directly proportional to absolute temperature ... products. 1.4 The term “Executive Officer” as used in this document means the Executive Officer of the Air Resources Board or his or her authorized representative. 2 TEST METHODS Method 310...

Ngày tải lên: 14/03/2014, 20:20

... resolved the Fe- and Mn-oxides as separate entities. Rare earth elements (REEs) have recently been extracted using a modified Zeien and Brümmer scheme [164]. Results showed that REEs have been ... characters” of the used extraction schemes, which requires the use of standardized protocols. Moreover, those schemes have to be validated and require the preparation of certified reference materials ... attributed to the loss of this metal in the “in between” reagent rinses required in the SEQ procedure. Greater recovery of Cu by SEQ vs. SIM method might be due to the pretreatment of the sediment...

Ngày tải lên: 15/03/2014, 23:56

Ngày tải lên: 18/03/2014, 02:20