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https://www.readbyqxmd.com/read/27766898/three-new-phenylpropanoids-from-lavandula-angustifolia-and-their-bioactivities
#1
Shiyun Tang, Jianlian Shi, Chunbo Liu, Rui Jiang, Wei Zhao, Xin Liu, Nengjun Xiang, Yongkuan Chen, Qinpeng Shen, Mingming Miao, Zhihua Liu, Guangyu Yang
Three new phenylpropanoids, 3-(3,4-dimethoxy-5-methylphenyl)-3-oxopropyl acetate (1), 3-hydroxy-1-(3,4-dimethoxy-5-methylphenyl)propan-1-one (2), and 3-hydroxy-1-(4-methylbenzo[d][1,3]dioxol-6-yl) propan-1-one (3), together with three known phenylpropanoids (4-6) were isolated from the whole plant of Lavandula angustifolia. Their structures were determined by means of HRESIMS and extensive 1D and 2D NMR spectroscopic studies. Compounds 1-6 were tested for their anti-tobacoo mosaic virus (TMV) activities and cytotoxicity activities...
October 21, 2016: Natural Product Research
https://www.readbyqxmd.com/read/25302222/sexuality-in-adolescents-have-we-explored-enough-a-cross-sectional-study-to-explore-adolescent-health-in-a-city-slum-in-northern-india
#2
Timsi Jain, Yogesh Mohan
CONTEXT: Adolescent health is a relatively new focus area of India's National health program. However, little evidence is available for the existing problems especially in adolescent slum population. A study was planned to explore the problems of adolescent pertaining to sexuality, physical health, tobacco and alcohol use in slums of Urban Meerut, and create evidence base for informed planning and decision making by the local health authorities. AIMS: To study the adolescent health in the slums of Meerut City, India...
August 2014: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/21576194/tobacco-myc2-regulates-jasmonate-inducible-nicotine-biosynthesis-genes-directly-and-by-way-of-the-nic2-locus-erf-genes
#3
Tsubasa Shoji, Takashi Hashimoto
In Arabidopsis, the MYC2-family basic helix-loop-helix transcription factors mediate transcriptional regulation of jasmonate-responsive genes, and their transcriptional activities are suppressed by physical interactions with jasmonate-ZIM domain (JAZ) proteins. Jasmonate-inducible nicotine formation in Nicotiana plants has been shown to be suppressed by tobacco JAZ proteins, and be regulated by both MYC2-related and NIC2-locus ethylene response factor (ERF) transcription factors. We here show that tobacco MYC2 (NtMYC2) recognizes the G-box sequences, 5'-CAC(G/A)T(G/T)-3', found in the proximal promoter regions of several nicotine biosynthesis genes, including Putrescine N-Methyltransferase 2 (PMT2) and Quinolinate Phosphoribosyltransferase 2 (QPT2)...
June 2011: Plant & Cell Physiology
https://www.readbyqxmd.com/read/20874598/potential-of-trap-crops-for-integrated-management-of-the-tropical-armyworm-spodoptera-litura-in-tobacco
#4
Zhongshi Zhou, Zepeng Chen, Zaifu Xu
The tropical armyworm, Spodoptera litura (F.) (Lepidoptera: Noctuidae), is an important pest of tobacco, Nicotiana tabacum L. (Solanales: Solanaceae), in South China that is becoming increasingly resistant to pesticides. Six potential trap crops were evaluated to control S. litura on tobacco. Castor bean, Ricinus communis L. (Malpighiales: Euphorbiaceae), and taro, Colocasia esculenta (L.) Schott (Alismatales: Araceae), hosted significantly more S. litura than peanut, Arachis hypogaea L. (Fabales: Fabaceae), sweet potato, Ipomoea batata Lam...
2010: Journal of Insect Science
https://www.readbyqxmd.com/read/10984482/the-chitinase-gene-of-the-silkworm-bombyx-mori-contains-a-novel-tc-like-transposable-element
#5
K Mikitani, T Sugasaki, T Shimada, M Kobayashi, J A Gustafsson
We have determined the cDNA sequence and the genomic organization of the chitinase gene of the silkworm, Bombyx mori. The cDNA encodes 544 amino acids having 83% amino acid homology to the chitinase of the tobacoo hornworm, Manduca sexta. The total length of the gene is larger than 25 kilobase pairs, and it is separated into 11 exons. The intron-exon boundaries are all in accordance with the GT-AG rule. Also, the TATA box sequence was found in the 5' upstream region of the gene, and the gene is mapped on the seventh chromosome...
December 1, 2000: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/5475751/the-effects-of-betel-nut-chewing-on-the-buccal-mucosa-a-histological-study
#6
K W Lee, C T Chin
Sixty-two "leukoplakias" from the cheeks of betel-nut chewers in West Malaysia were studied histologically. Ten biopsies were from non-tobacco betel-nut chewers. An amorphous von Kossa positive layer was seen on the keratin surface in 42 specimens. Tobacco did not appear essential for its formation, and it appeared to be significantly associated with parakeratosis. Its possible significance as a cuticle-like layer prolonging contact between carcinogens and the mucosa is discussed.Parakeratosis appeared to be the most common form of cornification seen, and the mitotic activity in parakeratinized leukoplakias appeared to be significantly greater than orthokeratinized leukoplakias...
September 1970: British Journal of Cancer
https://www.readbyqxmd.com/read/10315/analysis-of-the-acidic-fraction-of-marijuana-smoke-condensate-by-capillary-gas-chromatography-mass-spectrometry
#7
M P Maskarinec, G Alexander, M Novotný
A method for the analysis of organic acids and phenols isolated from marijuana smoke condensate has been developed. Comparative analyses of standard tobacoo, Mexican, and Turkish marijuana smoke condensates carried out by means of capillary gas chromatography indicated both qualitative and quantitative changes in the constituents of chromatographic profiles. Samples were converted to volatile derivatives by methylation and trimethylsilylation; whereupon, 49 aliphatic acids, aromatic acids, and phenolic compounds were identified by means of capillary gas chromatography-mass spectrometry...
November 3, 1976: Journal of Chromatography
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