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مرکز اطلاعات علمی SID1
اسکوپوس
مرکز اطلاعات علمی SID
ریسرچگیت
strs
Author(s): 

ALNAIZY R. | AKGERMAN A.

Issue Info: 
  • Year: 

    2000
  • Volume: 

    4
  • Issue: 

    3
  • Pages: 

    233-244
Measures: 
  • Citations: 

    376
  • Views: 

    13727
  • Downloads: 

    14299
Keywords: 
Abstract: 

Yearly Impact:

View 13727

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Author(s): 

POURREZA N.

Issue Info: 
  • Year: 

    2013
  • Volume: 

    8
  • Issue: 

    4
  • Pages: 

    149-150
Measures: 
  • Citations: 

    539
  • Views: 

    24367
  • Downloads: 

    18086
Keywords: 
Abstract: 

Yearly Impact:

View 24367

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Author(s): 

BOSKOU D. | BLEKAS G.

Issue Info: 
  • Year: 

    2005
  • Volume: 

    3
  • Issue: 

    -
  • Pages: 

    125-136
Measures: 
  • Citations: 

    315
  • Views: 

    4957
  • Downloads: 

    9195
Keywords: 
Abstract: 

Yearly Impact:

View 4957

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گارگاه ها آموزشی
Issue Info: 
  • Year: 

    2013
  • Volume: 

    22
  • Issue: 

    1
  • Pages: 

    25-32
Measures: 
  • Citations: 

    0
  • Views: 

    34528
  • Downloads: 

    16455
Abstract: 

NBR/PHENOLIC interpenetrating networks (IPNs) offer a wide variety of mechanical and physical properties at moderately high temperature. This temperature stability along with oil and fuel resistance property has made IPNs appropriate candidates for various applications. In the present work, NBR COMPOUNDS containing 5, 7 and 12 phr of Novolac, as a curable PHENOLIC resin was formulated using a two-roll mill. Low and high acrylonitrile NBR; KNB 35L and Europrene N4560 were selected in the compound and the same condition of mixing was applied in the blend preparation stage. Curing test, followed by a cooling period and the stress relaxation test were carried out consecutively and automatically in a rubber process analyzer. The samples presented various relaxation times. The relaxation curves were well estimated by Maxwell model and the Prony coefficients were determined. Furthermore, compression test was performed on the samples, so that the set or permanent deformation of each sample was measured. The results of both tests have indicated that by adding PHENOLIC resin into the NBR matrices, the viscoelastic behavior of the COMPOUNDS become more elastic, to the detriment of the viscous component. This phenomenon would be due to IPN formation in the COMPOUNDS. In addition, by increasing the PHENOLIC resin content in the COMPOUNDS, the difference between maximum and minimum torque (M H-M L) value became greater, which is an indicator of higher cross-link density and IPN formation. Swelling test results confirmed more extensive cross-links in the COMPOUNDS by addition of more resin into the compound.

Yearly Impact:

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Author(s): 

Issue Info: 
  • Year: 

    2018
  • Volume: 

    23
  • Issue: 

    -
  • Pages: 

    149-154
Measures: 
  • Citations: 

    740
  • Views: 

    8381
  • Downloads: 

    13642
Keywords: 
Abstract: 

Yearly Impact:

View 8381

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Issue Info: 
  • Year: 

    2010
  • Volume: 

    4
  • Issue: 

    14
  • Pages: 

    39-42
Measures: 
  • Citations: 

    0
  • Views: 

    1158
  • Downloads: 

    228
Abstract: 

Nitrophenols 2a-j were synthesized in moderate to high yields via nitration of phenols by antimony nitrate, Sb (NO3) 3.5H2O, as an efficient nitrating reagent. The reactions were carried out at room temperature by grinding equimolar amounts of phenol compound and Sb (NO3) 3.5H2O in an ice-water bath.

Yearly Impact:

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strs
Issue Info: 
  • Year: 

    2009
  • Volume: 

    8
  • Issue: 

    1
  • Pages: 

    71-75
Measures: 
  • Citations: 

    0
  • Views: 

    54944
  • Downloads: 

    28862
Abstract: 

From methanolic extract of aerial parts of Peucedanum ruthenicum M. Bieb (Apiaceae) collected from Mazandaran province of Iran, four flavonoids namely Isorhamnetin 3-0- rutinoside 1, rutin 2, quercetin 3, morin 4 and two PHENOLIC acids namely caffeic acid 5 and p-coumaric acid 6 have been isolated by Paper Chromatography (PC) and crystallization. Their structures were elucidated by MS, 1H,  13C NMR spectra.

Yearly Impact:

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Author(s): 

Issue Info: 
  • Year: 

    2017
  • Volume: 

    23
  • Issue: 

    -
  • Pages: 

    2787-2806
Measures: 
  • Citations: 

    374
  • Views: 

    10518
  • Downloads: 

    14119
Keywords: 
Abstract: 

Yearly Impact:

View 10518

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Issue Info: 
  • Year: 

    2013
  • Volume: 

    0
  • Issue: 

    21
Measures: 
  • Views: 

    72
  • Downloads: 

    36
Abstract: 

THE ANTIOXIDANT COMPONENTS HAVE BEEN IDENTIFIED IN SOME PINE SPECIES. ANTIOXIDANT PROPERTIES OF PROANTOCYANIDINS REDUCE FREE RADICALS INDUCED BY DNA FRAGMENTATION AND LIPID PROXIDATION AND ALSO PROANTHOCYANIDINES COULD CURB LIPID PEROXIDATION. IN THIS STUDY, WE ANALYZED DIFFERENT PARTS OF PINUS ELDARICA (BARK, SEED AND NEEDLE) AND ASSESSED THEIR ANTIOXIDANT CONTENTS. ...

Yearly Impact:  

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Issue Info: 
  • Year: 

    2021
  • Volume: 

    12
  • Issue: 

    4
  • Pages: 

    361-370
Measures: 
  • Citations: 

    0
  • Views: 

    1290
  • Downloads: 

    544
Abstract: 

Pistachio hull, as the dominant component of pistachio processing wastes, is a source of PHENOLICs with antioxidant properties. Extracting these COMPOUNDS from pistachio wastes has recently attracted a lot of attention. The current study aimed to identify the optimal conditions for extracting PHENOLICs from pistachio hulls. Firstly, some parameters such as different sample to solvent ratios (1: 10, 1: 20, and 1: 40), extraction temperatures (25, 45, and 65°, C), and duration times (1, 2, and 3 h) were evaluated under extracting solvent of water. The content of total PHENOLICs and antioxidant activity were determined using spectrophotometric methods. The results indicated that the highest PHENOLICs (~35 mg g-1) were extracted at 2 h extraction time, 65 °, C, and the sample to solvent ratio of 1: 10 (optimum condition by the solvent of water). Secondly, other organic solvents of ethanol, methanol, and acetone 50% were evaluated to identify the best solvent under optimal conditions. All of these organic solvents were more efficient than water in extracting total PHENOLICs (with antioxidant property) from pistachio hulls. However, the highest amount of total PHENOLICs (~47 mg g-1) was extracted by ethanol. Optimizing the extraction of PHENOLIC COMPOUNDS from pistachio hulls would be important in terms of reducing human and environmental risks caused by the waste accumulation, as well as producing naturally beneficial COMPOUNDS and using them instead of synthetic antioxidants in the human diet.

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