keyword
MENU ▼
Read by QxMD icon Read
search

Terpenoid

keyword
https://www.readbyqxmd.com/read/29346294/gc-ms-analysis-of-the-volatile-constituents-in-the-leaves-of-14-compositae-plants
#1
Yiguang Wang, Xiran Li, Qinjie Jiang, Hainan Sun, Jiafu Jiang, Sumei Chen, Zhiyong Guan, Weimin Fang, Fadi Chen
The green organs, especially the leaves, of many Compositae plants possess characteristic aromas. To exploit the utility value of these germplasm resources, the constituents, mainly volatile compounds, in the leaves of 14 scented plant materials were qualitatively and quantitatively compared via gas chromatography-mass spectrometry (GC-MS). A total of 213 constituents were detected and tentatively identified in the leaf extracts, and terpenoids (especially monoterpene and sesquiterpene derivatives), accounting for 40...
January 18, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29339971/terzyme-a-tool-for-identification-and-analysis-of-the-plant-terpenome
#2
Piyush Priya, Archana Yadav, Jyoti Chand, Gitanjali Yadav
Background: Terpenoid hydrocarbons represent the largest and most ancient group of phytochemicals, such that the entire chemical library of a plant is often referred to as its 'terpenome'. Besides having numerous pharmacological properties, terpenes contribute to the scent of the rose, the flavors of cinnamon and the yellow of sunflowers. Rapidly increasing -omics datasets provide an unprecedented opportunity for terpenome detection, paving the way for automated web resources dedicated to phytochemical predictions in genomic data...
2018: Plant Methods
https://www.readbyqxmd.com/read/29338355/new-compounds-with-antimicrobial-activities-from-elaeodendron-buchananii-stem-bark
#3
Jenipher Akinyi Odak, Lawrence Onyango Arot Manguro, Keng-Chong Wong
The plant species Elaeodendron buchananii Loes is widely used in folklore medicine to manage microbial infections in Kenya. Previous studies on the plant fruits and root bark revealed the presence of steroids and terpenoids. The present phytochemical analysis of the plant stem bark has led to the isolation of four new triterpenes characterized as methyl 3β-acetoxy-11α, 19α, 28-trihydroxyurs-12-en-23-oic acid (1), 3β, 11α, 19α-trihydroxyurs-12-en-23, 28-dioic acid (2), 3β-acetoxy-19α, 23, 28-trihydroxyurs-12-ene (3) and 3-oxo-19α, 28-dihydroxyurs-12-en-24-oic acid (4), together with ten known ones (5-14), whose structures were elucidated using spectroscopic techniques...
January 17, 2018: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/29338341/rna-sequencing-on-amomum-villosum-lour-induced-by-meja-identifies-the-genes-of-wrky-and-terpene-synthases-involved-in-terpene-biosynthesis
#4
Xueying He, Huan Wang, Jinfen Yang, Ke Deng, Teng Wang
Amomum villosum Lour. is an important Chinese medicine that has diverse medicinal functions, and mainly contains volatile terpenes This study aimed to explore the WRKY transcription factors (TFs) and terpene synthases (TPS) unigenes, which might be involved in terpene biosynthesis in A. villosum for providing some new information on the regulation of terpenes in plants. RNA sequencing of A.villosum-induced by methyl jasmonate (MeJA) revealed WRKY family was the second biggest TF family in the transcriptome...
January 16, 2018: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/29336271/anti-inflammatory-drugs-and-herbs-with-special-emphasis-on-herbal-medicines-for-countering-inflammatory-diseases-and-disorders-a-review
#5
Mohd Iqbal Yatoo, Arumugam Gopalakrishnan, Archana Saxena, Oveas Rafiq Parray, Noore Alam Tufani, Sandip Chakraborty, Ruchi Tiwari, Kuldeep Dhama, Hafiz M N Iqbal
BACKGROUND: Diseases with inflammatory etiopathology have increased in incidence in recent times. Drugs used for therapeutic management of such inflammatory diseases are relieving the ailment but at the same time also countering serious life-threatening consequences. Moreover, they are costly and rarely available at all places. In this context, research and development on medicinal herbs have opened a new era in the prophylactic and therapeutic management of inflammatory diseases. OBJECTIVE: To highlight the importance of anti-inflammatory medicine-synthetic drugs and natural herbs, their constituents, mechanism of action, benefits, side effects and future prospects...
January 15, 2018: Recent Patents on Inflammation & Allergy Drug Discovery
https://www.readbyqxmd.com/read/29325915/in-vivo-nonspecific-immunomodulatory-and-antispasmodic-effects-of-common-purslane-portulaca-oleracea-linn-leaf-extracts-in-icr-mice
#6
Elena S Catap, Markyn Jared L Kho, Maria Rexie R Jimenez
ETHNOPHARMACOLOGICAL RELEVANCE: Portulaca oleracea (common purslane) is used in traditional medicine to cure various illnesses. However, its immune-protective properties and antispasmodic effects still need more pharmacological data if the plant will be utilized in herbal and drug formulations. Therefore, the present study determined the capacity of this plant species to modulate nonspecific immune responses and to confirm its antispasmodic activity in vivo in ICR mice. MATERIALS AND METHODS: Phagocytic activity of peritoneal macrophage, splenic lymphocyte proliferation and plasma lysozyme levels were measured in mice that were immunosuppressed using cyclophosphamide and treated with the ethyl acetate extract of Portulaca oleracea...
January 8, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29318969/confronting-penetration-threshold-via-fluidic-terpenoid-nanovesicles
#7
Kamla Pathak, Ankur Vaidya, Vijay Sharma
BACKGROUND: Improvisation of the nanosized vesicular systems has led to a series of useful developments including the deformable vesicles namely transfersomes, ethosomes and invasomes. While the former two have been explored extensively, literature on invasomes is relatively scanty. METHOD: Invasomal formulations researched for various applications have been reviewed using search engine "Scopus". The present review focuses on the update on the research activity on effectiveness and permeation enhancing effects of invasomes for dermal and topical delivery...
January 8, 2018: Current Drug Delivery
https://www.readbyqxmd.com/read/29311454/-development-of-plant-metabolomics-and-medicinal-plant-genomics
#8
Kazuki Saito
 A variety of chemicals produced by plants, often referred to as 'phytochemicals', have been used as medicines, food, fuels and industrial raw materials. Recent advances in the study of genomics and metabolomics in plant science have accelerated our understanding of the mechanisms, regulation and evolution of the biosynthesis of specialized plant products. We can now address such questions as how the metabolomic diversity of plants is originated at the levels of genome, and how we should apply this knowledge to drug discovery, industry and agriculture...
2018: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/29301523/genoprotective-antioxidant-antifungal-and-anti-inflammatory-evaluation-of-hydroalcoholic-extract-of-wild-growing-juniperus-communis-l-cupressaceae-native-to-romanian-southern-sub-carpathian-hills
#9
Irina Fierascu, Camelia Ungureanu, Sorin Marius Avramescu, Carmen Cimpeanu, Mihaela Ioana Georgescu, Radu Claudiu Fierascu, Alina Ortan, Anca Nicoleta Sutan, Valentina Anuta, Anca Zanfirescu, Cristina Elena Dinu-Pirvu, Bruno Stefan Velescu
BACKGROUND: Juniperus communis L. represents a multi-purpose crop used in the pharmaceutical, food, and cosmetic industry. Several studies present the possible medicinal properties of different Juniperus taxa native to specific geographical area. The present study aims to evaluate the genoprotective, antioxidant, antifungal and anti-inflammatory potential of hydroalcoholic extract of wild-growing Juniperus communis L. (Cupressaceae) native to Romanian southern sub-Carpathian hills. METHODS: The prepared hydroethanolic extract of Juniperus communis L...
January 4, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29301201/exploring-the-chemical-diversity-of-algerian-plants-three-new-pentacyclic-triterpenoids-from-launaea-acanthoclada-roots
#10
Nabila Zergainoh, Maria Letizia Ciavatta, Marianna Carbone, Fatma Bitam, Mohamed Cherif Aberkane, Margherita Gavagnin
The chemical study of Launaea acanthoclada from South-East Algeria led to the isolation of twelve oxygenated terpenoid compounds, including three new pentacyclic triterpenoids 1-3 with either lupane or ursane rearranged skeletons. The structure and the stereochemistry of these compounds were established by spectroscopic methods, including NMR techniques. The chemical pattern of L. acanthoclada is in accordance with the triterpenoid scenario of the genus Launaea embracing to date lupane, oleane, ursane and taraxastane skeletons...
December 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29301045/ozone-triggered-surface-uptake-and-stress-volatile-emissions-in-nicotiana-tabacum-wisconsin
#11
Arooran Kanagendran, Leila Pazouki, Shuai Li, Bin Liu, Astrid Kännaste, Ülo Niinemets
Ozone is a strong oxidant and a key stress elicitor. The immediate and longer term impacts of ozone are poorly understood in species with emission of both de novo synthesized and stored volatiles, such a tobacco (Nicotiana tabacum), which has terpene-containing glandular trichomes on the leaf surface. In this study, we exposed N. tabacum 'Wisconsin' leaves to acute ozone doses of 0 (control), 400, 600, 800, and 1000 ppb for 30 min and studied the effects of ozone exposure on ozone uptake, gas-exchange characteristics, and emissions of lipoxygenase pathway volatiles, monoterpenes, and sesquiterpenes...
December 30, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29297926/combining-color-chart-colorimetric-measurement-and-chemical-compounds-for-postharvest-quality-of-white-wine-grapes
#12
Marco Sollazzo, Simone Baccelloni, Claudio D'Onofrio, Andrea Bellincontro
BACKGROUND: This paper provides data for the potential use of a color chart to establish the best quality of white wine grape destined to postharvest processing. Grechetto, Vermentino and Muscat of Alexandria white wine varieties, were tested by sampling berries at different dates along quality attributes evolution. A color chart and reflectance spectrocolorimeter were used in combination with analyses of total carotenoids and chlorophylls in all three varieties and volatile organic compounds (VOCs) for Grechetto alone...
January 3, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29296983/enhanced-structural-diversity-in-terpenoid-biosynthesis-enzymes-substrates-and-cofactors
#13
REVIEW
Abith Vattekkatte, Stefan Garms, Wolfgang Brandt, Wilhelm Boland
The enormous diversity of terpenes found in nature is generated by enzymes known as terpene synthases, or cyclases. Some are also known for their ability to convert a single substrate into multiple products. This review comprises monoterpene and sesquiterpene synthases that are multiproduct in nature along with the regulation factors that can alter the product specificity of multiproduct terpene synthases without genetic mutations. Variations in specific assay conditions with focus on shifts in product specificity based on change in metal cofactors, assay pH and substrate geometry are described...
January 3, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29295712/hplc-dad-finger-printing-antioxidant-cholinesterase-and-%C3%AE-glucosidase-inhibitory-potentials-of-a-novel-plant-olax-nana
#14
Muhammad Ovais, Muhammad Ayaz, Ali Talha Khalil, Sayed Afzal Shah, Muhammad Saeed Jan, Abida Raza, Muhammad Shahid, Zabta Khan Shinwari
BACKGROUND: The medicinal importance of a novel plant Olax nana Wall. ex Benth. (family: Olacaceae) was revealed for the first time via HPLC-DAD finger printing, qualitative phytochemical analysis, antioxidant, cholinesterase, and α-glucosidase inhibitory assays. METHODS: The crude methanolic extract of O. nana (ON-Cr) was subjected to qualitative phytochemical analysis and HPLC-DAD finger printing. The antioxidant potential of ON-Cr was assessed via 1,1-diphenyl,2-picrylhydrazyl (DPPH), 2,2-azinobis[3-ethylbenzthiazoline]-6-sulfonic acid (ABTS) and hydrogen peroxide (H2O2) free radical scavenging assays...
January 3, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29295521/molecular-targets-for-components-of-essential-oils-in-the-insect-nervous-system-a-review
#15
REVIEW
Milena Jankowska, Justyna Rogalska, Joanna Wyszkowska, Maria Stankiewicz
Essential oils (EOs) are lipophilic secondary metabolites obtained from plants; terpenoids represent the main components of them. A lot of studies showed neurotoxic actions of EOs. In insects, they cause paralysis followed by death. This feature let us consider components of EOs as potential bioinsecticides. The inhibition of acetylcholinesterase (AChE) is the one of the most investigated mechanisms of action in EOs. However, EOs are rather weak inhibitors of AChE. Another proposed mechanism of EO action is a positive allosteric modulation of GABA receptors (GABArs)...
December 23, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29287257/terpenoids-from-the-mushroom-associated-fungus-montagnula-donacina
#16
Zhen-Zhu Zhao, Kuan Zhao, He-Ping Chen, Xue Bai, Ling Zhang, Ji-Kai Liu
Molecular identification suggested an edible mushroom, which was previously named as Craterellus odoratus should be revised as Montagnula donacina. A chemical re-investigation of the culture broth of this fungus resulted in the isolation of four rare tetracyclic bergamotane-type sesquiterpenoids, namely donacinolides A and B, donacinoic acids A and B, and three cadinane-type ones, namely donacinols A-C and a meroterpenoid (Z)-4-hydroxy-3-(3-hydroxy-3-methylbut-1-en-1-yl)benzoic acid. Their structures were established via extensive spectroscopic methods, single crystal X-ray diffraction analysis, and computational methods...
December 26, 2017: Phytochemistry
https://www.readbyqxmd.com/read/29287108/antennal-olfactory-responses-of-adult-meadow-spittlebug-philaenus-spumarius-to-volatile-organic-compounds-vocs
#17
Giacinto Salvatore Germinara, Sonia Ganassi, Marco O Pistillo, Carmela Di Domenico, Antonio De Cristofaro, Antonella Marta Di Palma
The meadow spittlebug, Philaenus spumarius L. (Hemiptera, Aphrophoridae) is a commonly found vector of Xylella fastidiosa Wells et al. (1987) strain subspecies pauca associated with the "Olive Quick Decline Syndrome" in Italy. To contribute to the knowledge of the adult P. spumarius chemoreceptivity, electroantennographic (EAG) responses of both sexes to 50 volatile organic compounds (VOCs) including aliphatic aldehydes, alcohols, esters, and ketones, terpenoids, and aromatics were recorded. Measurable EAG responses were elicited by all compounds tested...
2017: PloS One
https://www.readbyqxmd.com/read/29281341/functional-foods-and-nutraceuticals-as-dietary-intervention-in-chronic-diseases-novel-perspectives-for-health-promotion-and-disease-prevention
#18
Stephen Adeniyi Adefegha
Functional foods describe the importance of foods in promoting health and preventing diseases aside their primary role of providing the body with the required amount of essential nutrients such as proteins, carbohydrates, vitamins, fats, and oils needed for its healthy survival. This review explains the interaction of functional food bioactive compounds including polyphenols (phenolic acids [hydroxybenzoic acids and hydroxycinnamic acids], flavonoids [flavonols, flavones, flavanols, flavanones, isoflavones, proanthocyanidins], stilbenes, and lignans), terpenoids, carotenoids, alkaloids, omega-3 and polyunsaturated fatty acids, among others with critical enzymes (α- amylase, α- glucosidase, angiotensin-I converting enzyme [ACE], acetylcholinesterase [AChE], and arginase) linked to some degenerative diseases (type-2 diabetes, cardiovascular diseases [hypertension], neurodegenerative diseases [Alzheimer's disease] and erectile dysfunction)...
December 27, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/29281032/zmwrky79-positively-regulates-maize-phytoalexin-biosynthetic-gene-expression-and-is-involved-in-stress-response
#19
Jingye Fu, Qin Liu, Chang Wang, Jin Liang, Lijun Liu, Qiang Wang
Maize (Zea mays) accumulates maize terpenoid phytoalexins (MTPs), kauralexins and zealexins in response to various elicitations. Although the key biosynthetic genes for these have been characterized, the regulatory mechanism remains unclear. Through co-correlation analysis, a transcription factor (TF), ZmWRKY79, was identified as highly correlated with expression of MTP biosynthetic genes. Gene expression analysis indicated that ZmWRKY79 was induced by Fusarium graminearum infection, phytohormone treatment, and multiple stresses...
December 21, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29280951/cytotoxic-terpenoids-from-the-roots-of-dracocephalum-taliense
#20
Yanyan Deng, Juan Hua, Wenjia Wang, Zhonglang Zhan, Anqi Wang, Shihong Luo
A chemical investigation of methanol extract from the roots of Dracocephalum taliense led to the isolation of a new aromatic abietane diterpenoid, 12-methoxy-18-hydroxy-sugiol (1), and one highly-oxygenated ursane triterpenoid, 2α,3α-dihydroxy-11α,12α-epoxy-urs-28,13β-olide (2), together with 15 known natural products (3-17). Among these, compounds 1-13 and 15-17 were detected for the first time in the genus of Dracocephalum. The structures of all of these isolates were determined by extensively spectroscopic analyses...
December 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
keyword
keyword
111953
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"