Do you want to publish a course? Click here

Gas chromatographic determination of Thymol, Carvacrol and Penine compounds in Thymus vulgaris essential oil at the Syrian Seaside

تقدير الثيمول الكارفاكرول و مركبات البينين باستخدام الكروماتوغرافيا الغازية في الزيت العطري للزعتر البري في الساحل السوري

1582   0   29   0 ( 0 )
 Publication date 2013
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

The thyme is a wild plant naturally present in the Syrian Seaside at varying altitudes up to more than 1000 m above sea level. The essential oil was extracted from thyme plants taken from seven sites (Safita - Beit Sheikh Younis, Khirbet Al-Mezah – Albirdanie, Sheikh Badr – Aljalsat, Banias – Shibani, Qadmous – Alhatria, Qardahah - Deir Hanna, Albhloulih - Beit Alia) by distilling 200 g of dry leaves from each site to obtain the essential oil.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة تحليل الزيت العطري المستخلص من نبات الزعتر البري المنتشر في الساحل السوري باستخدام تقنية الكروماتوغرافيا الغازية - مطياف الكتلة (GC-MS). تم جمع العينات من سبعة مواقع مختلفة على ارتفاعات متفاوتة تصل إلى أكثر من 1000 متر فوق سطح البحر. أظهرت نتائج التحليل الكيميائي أن نسب الثيمول تراوحت بين 1.28% و7.80%، بينما تراوحت نسب الكارفاكرول بين 75.32% و83.27%، في حين أن نسبة البينين تراوحت بين 11.86% و22.58%. أظهرت النتائج وجود فروقات معنوية بين نسب المركبات في المواقع المختلفة، حيث كانت أعلى نسبة للثيمول في موقع بانياس - الشيباني، وأعلى نسبة للكارفاكرول في موقع الشيخ بدر - الجلسات، وأعلى نسبة للبينين في موقع القدموس - الحاطرية. توصي الدراسة بإجراء دراسات مكملة تشمل التحليل الوراثي والبيوكيميائي للزيت العطري، بالإضافة إلى دراسة تأثير التخزين على محتوى الزيت من المركبات الكيميائية.
Critical review
دراسة نقدية: تعتبر هذه الدراسة ذات أهمية كبيرة نظراً لأهمية نبات الزعتر البري من الناحية الاقتصادية والطبية. ومع ذلك، يمكن توجيه بعض النقد البناء لتحسين الدراسة. أولاً، كان من الممكن توسيع نطاق الدراسة ليشمل المزيد من المواقع لزيادة دقة النتائج. ثانياً، لم يتم تناول تأثير العوامل البيئية الأخرى مثل التربة والمناخ بشكل كافٍ، مما قد يؤثر على محتوى الزيت العطري. ثالثاً، كان من الممكن إجراء مقارنة مع زيوت عطرية مستخلصة من نباتات زعتر مزروعة في بيئات مختلفة لتقديم صورة أكثر شمولية. على الرغم من هذه النقاط، فإن الدراسة تقدم مساهمة قيمة في فهم التركيب الكيميائي للزيت العطري لنبات الزعتر البري في الساحل السوري.
Questions related to the research
  1. ما هي التقنية المستخدمة في تحليل الزيت العطري لنبات الزعتر البري في هذه الدراسة؟

    تم استخدام تقنية الكروماتوغرافيا الغازية - مطياف الكتلة (GC-MS) لتحليل الزيت العطري لنبات الزعتر البري.

  2. ما هي أعلى نسبة للثيمول وأين تم العثور عليها؟

    أعلى نسبة للثيمول كانت 7.80% وتم العثور عليها في موقع بانياس - الشيباني.

  3. ما هو المركب الكيميائي الذي كان له أعلى نسبة في جميع العينات؟

    المركب الكيميائي الذي كان له أعلى نسبة في جميع العينات هو الكارفاكرول، حيث تراوحت نسبته بين 75.32% و83.27%.

  4. ما هي التوصيات التي قدمتها الدراسة لمزيد من الأبحاث؟

    توصي الدراسة بإجراء دراسات مكملة تشمل التحليل الوراثي والبيوكيميائي للزيت العطري، بالإضافة إلى دراسة تأثير التخزين على محتوى الزيت من المركبات الكيميائية.


References used
Abu-Lafi S., Odeh I., Dewik H., Qabajah M., Imam A. , Dembitsky V. M., Hanus L. O., Natural Compounds of Palestine Flora. Comparison Analysis by Static Headspace and Steam Distillation GC-MS of Semivolatile Secondary Metabolites from Leaves of Cultivated Palestinian MAJORANA SYRIACA. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub., V . 151 I. (1), 2007 P.21–29
Adams, R.P., Identification of Essential Oil Components by Gas Choromatography /Mass Spectroscopy ( GC-MS ) . Allured Publication Corp., Carlo Stream, Il -USA; 1995. P. 456
Al-Said , Mansour S ; Mossa , Jaber S ; Atiqur M , Rahman ; Al-Yahya , Mohammad A . Medicinal plant diversity in the flora of Saudi Arabia 1: a report on seven plant families –Fitoterapia / Volume 75, Issue 2, March 2004, P. 149-161
rate research

Read More

The research aims to study the effect of five harvesting wed (vegetative growth, the beginning of open inflorescences flowering, the beginning of flowering, full bloom, and completeness of the vegetative growth at the beginning of the month of Sept ember and that of plants that have already cutted), some of the morphological and productivity indicators for common thyme Thymus vulgaris L . Experiment was designed by the complete randomized manner in three replicates. Statistical analysis was performed by Anova test using Genestat and account teams less moral LSD at a significance level of 5%. Results showed superiority date mower fifth morally on the rest of the dates in terms of index number of branches (16.50 branch / plant), productivity of the wet weight (55.00 g / plant), productivity of dry matter (27.08 g / plant), while the superiority of the date of the second mowing morally the rest of the appointments in terms of the percentage of essential oils (size / weight) (2.10%), also reached the top of the plant at the time of his high mowing fourth (21.50 cm). Highlights the importance of the results by identifying the optimal harvesting date to get the most fresh and dry weight of material and the highest percentage of essential oil, and the resulting economic return to the farmer healthy and beneficial to the consumer, with the continued preservation of the existence of the plant and its tender.
Chemical composition of the essential oil of the aerial parts of Artemisia vulgaris L. (Asteracea), grown in Syria was determined by GC/MS. The oil obtained by hydrodistillation, was found to contain 55 components, accounting for 98.82 %.
Due to the economical and medical importance of the Capparisspinosa plant and the wide distribution of this plant in the Syria environment, it was thought that a study of the composition of Essential Oil extracted from this plant. The Capparisspin osa Essential Oil was extracted and purified components wher studied by GC-Mass spectrometry. The Oil was obtained by steam distillation (Clevegerexractor) and by solvent n- Hexane. Components have been found which was about (98.9 %) from the total of essential oil. The major components were determined by steam distillation which were the following:Palmitic acid (21.12%), Hexatriacontane (15.87%), n-Heneicosane (10.96%), Pentatriacontane (9.92%), Hexahydrofarnesyl acetone (8.51%). The major components were determined by solvent Hexane: Isobornyl acrylate (66.89%), 2-Azido-2,3,3-trimethylbutane (6.09%), Ethanolamine (5.41%).
The ancient people had used and kept a lot of tools and most important of all were clay cooking pots and dishes, etc.., and they left them as remains to tell about the way they were living and feeding . So, it was quite important to carry out some analysis on the organic residue of archaeological clay sherds from cooking pots or dishes from the area of Homs from the era of the Roman and Islam. A Special attention was focused on the analysis of lipids, which have the properties of resisting the effect of the environment after it is absorbed in the clay matrix. Lipids can be extracted with suitable solvents, either total extraction, or after the treatment of the undisolved portion of the clay with alkaline. Analysis using gas chromatography and gas chromatography - mass spectrometery, revealed the existence of mono and di carboxylic acids, saturated and unsaturated fatty acids, alkanes, and mono, di, and tri glycerides. The measurement of the ratio C١٦/C١٨ gave the indication to the use of animal fats in these pots.
The study was conducted on randomized samples of virgin olive oils collected from Hama, Aleppo, Daraa, Latakia, Homs and Idleb to investigate the relationship between the quality indices of oil purity (peroxide value, the figure iodine, coefficien t of acidity, the absorption coefficient qualitative Xultraviolet K270 and distributed fatty acids) and related volatile flavor components compared with what is published in the literature. The results also showed that the quality indices of Hama and Lattakia، s samples in terms of extra virgin olive oil and the first class of virgin olive oil were not compatible with the Syrian Standards and metrology (2000/182) while the concentrations of fatty acids for samples of Idleb, Homs, Latakia, Deraa and Aleppo were within the scope of Syrian standard. However, their distribution in Hama samples did not comply with the ratios set forth in the Syrian specifications. Forty three volatile compounds were isolated and they correspond with what is published. The samples of research showed somewhat of similarity to a large extent with the exception of a sample of Hama, where a decline was observed in the content of volatile flavored materials. It was noticed that the essential composition of volatile compounds of the samples was aldehydes followed by ester of fatty acids and then hydrocarbons. The study showed that the technique used in this research was fast and efficient in extraction and identification of volatile compounds.
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا