scholarly journals Analysis of allelochemicals in the leaves of four alpine rhododendrons by gas chromatography-mass spectrometry

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 3096-3102
Author(s):  
Yannan Pan ◽  
Wenxuan Quan ◽  
Chaochan Li ◽  
Jiangtao Hao ◽  
Yongdao Gao
Keyword(s):  
Mass Spectrometry ◽  
Natural Regeneration ◽  
Nature Reserve ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Alcohol Content ◽  
Chemical Substances ◽  
Field Investigations ◽  
In The Wild ◽  
Aldehyde Content

Field investigations conducted in the wild alpine rhododendron forest in the Baili Rhododendron Nature Reserve found that the natural regeneration of the forest was hindered. This paper used GC-MS to identify and analyze the most abundant chemical compounds in the leaves of four of rhododendron species (Rhododendron simsii, Rhododendron decorum, Rhododendron liliiflorum, and Rhododendron pulchrum). The results showed that the chemical substances in the four rhododendron leaf samples were mainly aldehydes, alcohols, and esters. Among them, the ester content in the leaves of R. simsii is the most abundant, the alcohol content in the R. decorum is the most abundant, and the aldehyde content in the R. liliiflorum is the most abundant. These results are conducive to the protection of the rhododendron ecosystem and laid a scientific foundation for studying the difficulties of natural regeneration of rhododendron communities.

scholarly journals Contact Toxicity and Repellency of the Essential Oil from Bupleurum bicaule Helm against Two Stored Product Insects

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Xiao-Meng Wei ◽  
Shan-Shan Guo ◽  
Hua Yan ◽  
Xian-Long Cheng ◽  
Feng Wei ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Essential Oil ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Bornyl Acetate ◽  
Contact Toxicity ◽  
Lasioderma Serricorne ◽  
Stored Product Insects

Essential oils obtained from many plants showed various kinds of insecticidal properties; some of them have been considered as alternative insecticides for pest control. The present study was aimed at determining the chemical composition of the essential oil from the roots of Bupleurum bicaule Helm, as well as evaluating the contact and repellent activities of the oil and four identified compounds against Lasioderma serricorne and Liposcelis bostrychophila adults. The essential oil was extracted by hydrodistillation, and its components were analyzed by gas chromatography-mass spectrometry (GC-MS). 26 components were determined and the main compounds included trans-2-isopropylbicyclo[4.3.0]non-3-en-8-one (25.9%), 4,5-dimethyl-1,2,3,6,7,8,8a,8b-octahydrobiphenylene (23.5%), and 1,4-dimethoxy-2-tert-butylbenzene (4.3%). It was found that the essential oil exhibited contact toxicity against L. serricorne (LD50 = 11.91 μg/adult), but the contact toxicity against L. bostrychophila could not be observed. The essential oil also showed strong repellent activity against L. serricorne with percent repellency of 100% at 78.63 nl/cm2. Four chemical compounds, 1,4-dimethoxy-2-tert-butylbenzene, bornyl acetate, (2E,4E)-2,4-nonadienal, and β-bisabolene, exhibited various levels of bioactivities. The experimental results indicated that the essential oil of B. bicaule and its individual compounds could be used in insecticidal and repellent strategies for stored product insects.

scholarly journals Identification of Chemical Substances in Environmental Samples by Gas Chromatography/Mass Spectrometry.

1995 ◽  
Vol 5 (1) ◽  
pp. 47-64 ◽  
Author(s):  
Yoshifumi HANADA ◽  
Kiwao KADOKAMI ◽  
Hiroaki SHIRAISHI ◽  
Kiyoshi IMAMURA ◽  
Shigeru SUZUKI ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Environmental Samples ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Substances ◽  
Chromatography Mass Spectrometry

scholarly journals ANALYSIS OF CHEMICAL COMPOUNDS OF AGARWOOD OIL FROM DIFFERENT SPECIES BY GAS CHROMATOGRAPHY MASS SPECTROMETRY (GCMS)

2014 ◽  
Vol 15 (1) ◽  
Author(s):  
Yumi Zuhanis Has-Yun Hashim ◽  
Nur Izzah Ismail ◽  
Phirdaous Abbas
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Components ◽  
Chromatography Mass Spectrometry ◽  
Three Samples ◽  
Pleasant Odour ◽  
Agarwood Resin ◽  
Agarwood Oil

ABSTRACT: Agarwood oil is a highly prized type of oil due to its unique aroma. The oil is extracted from the fragrant resin found in the agarwood tree (trunk).  The unique aroma and quality of agarwood resin and oil are contributed by the presence of certain chemical compounds. In this work, analysis and comparison of the chemical compounds of agarwood oil from A. malaccensis, A. sub-integra and a mixture of both were conducted.  The essential oils were diluted in hexane (5%) prior to gas chromatography mass spectrometry (GCMS) analysis performed using Agilent GCMS 7890A coupled with MSD quadrupole detector 5975 C.  Separation of analytes by gas chromatography was carried out using a Hewlett Packard HP-5MS silica capillary column (30 m X 0.25 mm X 0.25 mm). A total of 107 compounds were identified from the three samples of agarwood oils. Fifty-five (55) components were identified in A. malaccensis sample which contributes to the largest portion of the total compounds. About 20% of the compounds identified were aromatic and sesquiterpenes which have been revealed to be the main active compounds of agarwood oils which also give the aroma and pleasant odour of agarwood. Different compositions or profile of chemical components were found in agarwood oils from the two different species. Two compounds were commonly identified in all three samples namely 3-phenyl-2-butanone and alpha-cubebene.  Further studies are needed to refine the results which later can be used to assist detection and authentication of agarwood as well as its scientific-based grading. ABSTRAK: Minyak gaharu merupakan sejenis minyak beraroma unik yang mendapat permintaan tinggi dan mahal. Minyak ini diekstrak daripada resin beraroma yang terbentuk di dalam batang pokok gaharu. Keunikan aroma dan kualiti resin dan minyak gaharu ini bergantung kepada kehadiran bahan kimia tertentu. Penyelidikan ini menjurus kepada analisis dan perbandingan bahan-bahan kimia yang terdapat dalam minyak gaharu daripada spesis A. malaccensis, A. sub-integra dan campuran kedua-duanya. Minyak gaharu dilarutkan di dalam 5% heksana sebelum dianalisis menggunakan kromatografi gas Agilent GCMS 7890A berserta spektormetri jisim (MSD quadrupole detector 5975 C). Kolum kapilari silika Hewlet Packard HP-5MS (30 m X 0.25 mm X 0.25 mm) digunakan untuk pemisahan bahan-bahan kimia tersebut. Sejumlah 107 kompaun dikenalpasti dalam ketiga-tiga sampel minyak gaharu tersebut dengan 55 kompaun didapati di dalam sample A. malaccensis. Ini merupakan bahagian terbesar daripada keseluruhan kompaun. Sebanyak 20 % daripada keseluruhan kompaun yang dikenalpasti adalah daripada kumpulan seskuiterpena dan bersifat aromatik, juga merupakan kumpulan yang bertanggungjawab memberi aroma yang unik kepada minyak gaharu. Setiap spesis didapati mempunyai komposisi atau profil bahan kimia yang tersendiri. Dua kompaun iaitu 3-phenyl-2-butanone dan alpha-cubebene ditemui dalam ketiga-tiga sample yang dianalisis. Kajian lanjut adalah perlu untuk memurnikan dapatan hasil penyelidikan yang berpotensi bagi membantu pengenalpastian gaharu berserta pembangunan penggredan gaharu yang lebih saintifik.

scholarly journals Premna Species in Vietnam: Essential Oil Compositions and Mosquito Larvicidal Activities

Plants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1130
Author(s):  
Nguyen Huy Hung ◽  
Le Thi Huong ◽  
Nguyen Thanh Chung ◽  
Nguyen Cong Truong ◽  
Do Ngoc Dai ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Essential Oil ◽  
Essential Oils ◽  
National Park ◽  
Nature Reserve ◽  
Gas Chromatography Mass Spectrometry ◽  
Central Vietnam ◽  
Sesquiterpene Hydrocarbons ◽  
Larvicidal Activities ◽  
First Time

Essential oils have emerged as viable alternatives to synthetic insecticides for control of mosquito-borne pathogens. The leaf essential oils of eight species of Premna (Lamiaceae) growing in central Vietnam have been obtained by hydrodistillation and analyzed by gas chromatography–mass spectrometry. Sesquiterpene hydrocarbons dominated most of the Premna essential oils, with the notable exception of Premnamekongensis from Ngoc Linh Nature Reserve, which had α-pinene as the major component. Larvicidal activities against Aedes aegypti have been determined and all of the Premna essential oils showed larvicidal activity with 24-h LC50 < 65 μg/mL. The leaf essential oils of Premnacambodiana from Chu Mom Ray National Park and Premnamekongensis from Ngoc Linh Nature Reserve showed the best larvicidal activities with 24-h LC50 of 16.8 and 18.0 μg/mL, respectively. The essential oil compositions and larvicidal activities of P. cambodiana, Premna flavescens, Premnamaclurei, P. mekongensis, and Premnapuberula are reported for the first time. Although the larvicidal activities of Premna leaf essential oils are promising, the essential oil yields are relatively low (0.10–0.25%).

scholarly journals Comparative study of the chemical composition and biological activities of the essential oils of Senecio gallicus from Tunisia.

2014 ◽  
Vol 10 (8) ◽  
pp. 3012-3021
Author(s):  
Mohamed Mihoubi ◽  
Wafa Mihoubi ◽  
Ali Gargouri ◽  
Raoudha Jarraya
Keyword(s):  
Mass Spectrometry ◽  
Staphylococcus Aureus ◽  
Gas Chromatography ◽  
Essential Oils ◽  
Biological Activities ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Bacillus Sp ◽  
Moderate Effect ◽  
And Staphylococcus Aureus

The essential oils of flowers and remaining parts of the plant Senecio gallicus (Asteraceae), growing wild in Sfax (Tunisia), were obtained by hydrodistillation over a period of two years (2012 and 2013). Their analysis by Gas Chromatography-Mass Spectrometry (GC-MS), led to a total number of 36 components, belonging to different classes of chemical compounds. Oils compositions were characterized by the abundance of monoterpenes hydrocarbons, the major compounds present in flowers for the two years of study were  respectively the sabinene (49.45% and 28.86%), the α-pinene (9.67% and 9.1%), and the β-myrcene (9.88% and 10.97%). These compounds were also dominant in the essential oils of the plant without flowers where they represent (65.34% and 55%) for the sabinene, (4.14% and 7.3%) for α-pinene, and (6.86% and 0%) for β-myrcene. Obtained essential oils were tested for many biological activities and showed a moderate effect against the fungus Trichoderma reesei and bacteria such as Bacillus sp and Staphylococcus aureus. This study of the Senecio gallicus essential oils represents the first one in Tunisia.

scholarly journals Identifikasi Senyawa Kimia Fenolik Dalam Ekstrak Etil Asetat Kulit Buah Jengkol (Archidendron pauciflorum (Benth.) I.C Nielsen)

2019 ◽  
Vol 11 (02) ◽  
pp. 111-119
Author(s):  
Ahmad Sopian Pian
Keyword(s):  
Mass Spectrometry ◽  
Ethyl Acetate ◽  
Reduction Method ◽  
Ethyl Acetate Extract ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Processed Food ◽  
Fruit Peel ◽  
Fruit Skin ◽  
Radical Reduction

Jengkol (Archidendron pauciflorum (Benth.) I.C Nielsen) is a plant that is already familiar inIndonesia and is widely used as a processed food that is quite popular. One of the underutilized parts ofthe jengkol plant is the skin. Jengkol fruit peel contains alkaloid compounds, flavonoids, tannins,glycosides, sapoinin and steroids or triterpenoids. The purpose of this study was to determine the contentof chemical compounds in ethyl acetate extract of jengkol fruit peel, and to test antioxidant activity byDPPH free radical reduction method. The results of isolation, purification in ethyl acetate extract ofjengkol fruit skin does not provide activity as an antioxidant. The results of the analysis using FTIRspectrophotometry, Gas chromatography-Mass Spectrometry (GC-MS) and Nuclear Magnetic ResonanceSpectroscopy ( 1 HNMR).

scholarly journals Identification Michelia alba barks extract using Gas Chromatography-Mass Spectrometry (GC-MS) and its antifungal properties to inhibit microbial growth

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
I Made Dira Swantara ◽  
I Gusti Agung Gede Bawa ◽  
Dewa Ngurah Suprapta ◽  
Kadek Karang Agustina ◽  
I Gede Rai Maya Temaja
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Leaf Spot ◽  
Microbial Growth ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Bark Extract ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Antifungal Properties

Abstract. Swantara IMD, Bawa IGAG, Suprapta DN, Agustina KK, Temaja IGRM. 2020. Identification Michelia alba barks extract using Gas Chromatography-Mass Spectrometry (GC-MS) and its antifungal properties to inhibit microbial growth. Biodiversitas 21: 1541-1550. Fungicides are substances that inhibit the growth or kill the pathogenic fungi. A substance can be categorized as a fungicide if it shows antifungal activity. This activity is resulting from bioactive compounds derived from the secondary metabolites. Michelia alba bark’s extract could inhibit the growth of Curvularia verruculosa, the cause of leaf spot disease on rice. The purpose of this study was to analyze chemical compounds of bark extract which inhibit the growth of C. verruculosa. The extraction of bark metabolites of M. alba was done using methanol as the solvent. The inhibitory test of the extract was carried out by the diffusion well method on Potato Dextrose Agar (PDA) medium. Analysis of chemical compounds of the M. alba extract was carried out in Gas chromatography-mass spectroscopy. The results of inhibitory test found that the M alba bark extract inhibits the C. verruculosa with the inhibition zone as wide as 36 mm in diameter. The majority of chemical compounds identified from the M. alba extract consisted of 10 compounds, namely: Hexadecanoic acid, methyl ester; 4H-tomentosine; 4H-tomentosine (compound isomer 2); 3-hydroxy pregn-4-ene-20-one; Tomentosine; 2-hydroxy tomentosine; Tert-butyl-2-aminophenylcarbamol; 2H-cyclohepta [b] furan-2-one, 3,3a, 4,7,8,8a-hexahydro-7-methyl-3-methylene-6-(2-formil-3-oxobutyl)-; Isoxanthanol and Xanthanol. To conclude, this extract is useful to treat C. verruculosa that causes leaf spot disease on rice.

Sign in / Sign up

Export Citation Format

Share Document