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1.
Aziz Tekin Melih Cizmeci Hulya Karabacak Muammer Kayahan 《Journal of the American Oil Chemists' Society》2002,79(5):443-445
Trans FA (TFA), solid fat contents (SFC), and slip melting points of 12 different tub and stick margarines marketed in Turkey were
examined in this study. No trans isomers were found in four margarines, which suggests they were formulated from interesterified or blended fats and oils.
The products with no TFA generally had more short-chain saturated FA, which suggests coconut oil-based oil components. TFA
content of the other 10 products varied from 7.7 to 37.8%. Compared to the products formulated in North America, Turkish margarines
contain more TFA and have higher SFC. 相似文献
2.
Hakime Hulya Orak Hulya Yagar Sebnem Selen Isbilir 《Food science and biotechnology》2012,21(2):373-387
In this study, the antioxidant activities of juice, peel, and seed parts of pomegranate were investigated by using DPPH scavenging
activity, β-carotene bleaching method, reducing power, and metal chelating activity. Sample of pomegranates which are named
Punica granatum L. cv. Hicaznar, genotype 19–121, genotype 17–67, and genotype 19–66 obtained from BATEM (West Mediterranean Agricultural Research Institute) in Anlalya. The EC50 values of DPPH scavenging activities in peel extracts (PE) had 23.4-fold higher than the juice extracts (JE), and the seed
extracts (SE) had 2.3-fold higher than JE. The reducing power in peel extracts was found to be 4.7-fold higher than SE and
10.5-fold higher than the JE. The highest metal chelating capacity (37.22%) was determined in peel, while the lowest (7.151%)
in seed. Generally, in peel, the total polyphenol, flavonoid, tannin contents, and in juice, the total polyphenol, anthocyanin,
tannin contents, and acidity significantly affected to antioxidant activities. 相似文献
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4.
Tevfik Tozkoparan Emre Ulas Macit Olcer Cavit Arikan Meric Batmaz Aylin Saracoglu Goknur Murat Ozyilmaz Sevgi Kayhan Ebru Soydas Izmir Branch Archives Noyan Sancar Mehmet Yasa Guven Incirlioglu 李璠 《世界建筑》2010,(7):26-31
<正>一座建筑的性能应当如何来衡量?除了通过统治当代建筑舆论的美学、技术以及经济价值来进行描述之外,我们还能够如何来阐释一座建筑,尤其是一座致力于庇护那些渴望展现自己的艺术家的建筑?有人会问成功的表演是如何实现的,表演者是如何进行伪装的、又是如何展现自己的?根据海德格尔的理论,当我们看不到钉子的时候,铁锤的表现才是成功的;钉子本身的出现通常表明出现了问题。 相似文献
5.
A novel electrochromic device (ECD) working in mid- to long-wave infrared (IR) region is presented, comprising of a solid-state monolithic thin film system for adjusting heat rejection/receiving levels on attached surfaces. The system is an electrically controllable active emissivity modulator. EclipseVED™, variable-emissivity ECD, is designed for satellite and spacecraft thermal control, using an active ECD system for long-wave infrared (LWIR) modulation and a passive cold mirror for solar rejection. Emissivity modulation of the system is 0.8 for 7–12 μm region while average solar rejection is 80% in the vis–NIR region. Device properties and initial space test results are also presented. 相似文献
6.
In the dry milling of wheat flour, each unit process (roller mill, purifier, sifter, etc.) produces a mixture with varying amounts of wheat endosperm and non-endosperm byproducts. Chemical images with 82 000 pixels of each intermediate product stream issuing from an individual processing machine are readily analyzed in terms of the relative amount of endosperm and non-endosperm. Approximately three minutes is required to produce an image of each intermediate product stream. Applying partial least squares (PLS) chemometric software to identify individual pixels, which enables calculation of the relative amount of endosperm and non-endosperm, is not a time-limiting factor. When relative flow rates are known for each stream, mass balance can be calculated from each intermediate stream in terms of the product (endosperm content) and the lower value non-endosperm byproduct. Data is presented from a purifier in a commercial flour mill. Intermediate streams collected from a run with optimized operational parameters were compared to those of another run before adjustment. The endosperm (product) mass balance profile for each run enabled assessment of operational efficiency. The devised chemical imaging analysis system would be particularly useful in commissioning of a new mill or to optimize existing wheat milling systems. Also, when raw material differs from that for which previous optimization was established, a new optimization may be in order. The ability to acquire a large number of spectra from a specimen and apply multivariate statistics to identify each pixel and subsequently count pixels accommodates heterogeneity and reports the results from averaging a very large number of individual spectra. A second illustration of the utility of the imaging method is presented centering on streams from the first and second break unit operations at the beginning of the roller mill process. 相似文献
7.
Kagan VE Bayir A Bayir H Stoyanovsky D Borisenko GG Tyurina YY Wipf P Atkinson J Greenberger JS Chapkin RS Belikova NA 《Molecular nutrition & food research》2009,53(1):104-114
The critical role of mitochondria in programmed cell death leads to the design of mitochondriotropic agents as a strategy in regulating apoptosis. For anticancer therapy, stimulation of proapoptotic mitochondrial events in tumor cells and their suppression in surrounding normal cells represents a promising paradigm for new therapies. Different approaches targeting regulation of components of mitochondrial antioxidant system such as Mn-SOD demonstrated significant antitumor efficiency, particularly in combination therapy. This review is focused on a newly discovered early stage of mitochondria-dependent apoptosis - oxidative lipid signaling involving a mitochondria-specific phospholipid cardiolipin (CL). Cytochrome c (cyt c) acts as a CL-specific peroxidase very early in apoptosis. At this stage, the hostile events are still secluded within the mitochondria and do not reach the cytosolic targets. CL oxidation process is required for the release of pro-apoptotic factors into the cytosol. Manipulation of cyt c interactions with CL, inhibition of peroxidase activity, and prevention of CL peroxidation are prime targets for the discovery of anti-apoptotic drugs acting before the "point-of-no-return" in the fulfillment of the cell death program. Therefore, mitochondria-targeted disruptors and inhibitors of cyt c/CL peroxidase complexes and suppression of CL peroxidation represent new strategies in anti-apoptotic drug discovery. 相似文献
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9.
Thomas C. Pearson Daniel L. Brabec Hulya Dogan 《Sensing and Instrumentation for Food Quality and Safety》2009,3(2):89-99
Natural variation of hardness of wheat kernels often results in overlapping hardness indices (HI) distributions between hard
and soft classes as measured with the single kernel characterization system (SKCS). This is particularly true for the case
of the hard white (HW) and soft white (SW) wheat classes. To address this problem, a color camera was incorporated into the
SKCS system so that color and kernel size data could be combined with SKCS measurements for classification purposes. Samples
of hard red (HR), soft red (SR), HW, and SW wheat were classified using the SKCS system with and without the camera and results
compared. Using the camera system, errors for separating HW from SW classes were reduced to less than 5%, as compared to 17.1%
using SKCS alone. Furthermore, improved data processing applied to the low-level data currently produced by the SKCS system
led to greater than 50% reduction in classification errors between SW and HR as compared to using HI data alone. Similar improvements
in classification accuracies for 300-kernel sample containing mixtures of SW and HW were also achieved. The 300 kernel sample
classification is usually what inspectors and grain traders use to determine sample purity rather than individual kernel results.
The techniques developed should aid grain inspectors in properly identifying mixtures of these two classes. Unfortunately,
for the SR and HR classes, incorporating the camera data decreased classification accuracy while increasing the complexity
of the system. However, SR and HR classes can be adequately distinguished with the SKCS in its current form.
Mention of trade names or commercial products in this publication is solely for the purpose of providing specific information
and does not imply recommendation or endorsement by the U.S. Department of Agriculture. 相似文献
10.
A study is carried out for hydrogenation of Mg based thin films produced via thermal evaporation. Films produced were pure Mg, Mg capped with Au–Pd, Mg–Cu co-deposited and Mg–Cu multilayered. The films under the experimental conditions employed were crystalline with columnar grains with some degree of preferred orientation. In multi-component systems, the films in the as-deposited state were made of individual elements, but upon hydrogenation at temperatures greater than 473 K, the elements react with each other yielding the intermetallic phases. The study showed that, of the systems studied in this work, Mg–Cu multilayer yielded the most favorable result as useful storage system, for Mg portion of the film can be converted totally into MgH2, this occurring at temperatures not greater than 473 K. The study implies that if the as-deposited structure were to be used and preserved as hydrogen storage medium, there is a narrow temperature window for hydrogenation. 相似文献