Search results for " chinese"
showing 10 items of 163 documents
Jenisseensosides C and D, biologically active acylated triterpene saponins from Silene jenisseensis
1997
Abstract We previously reported the isolation and structure elucidation of a new trans - p -methoxycinnamoyl triterpene-saponin along with its cis - p -methoxycinnamoyl isomer as an inseparable mixture from the roots of Silene jenisseensis . In a continuing study on this plant, two additional new acylated triterpene-saponins were obtained as an inseparable mixture. Their structures have been established by chemical means and spectroscopic methods including 1D and 2D homonuclear and heteronuclear correlation NMR spectroscopy as 3- O -[β- d -galactopyranosyl-(1 → 2)-β- d -glucuronopyranosyl]-28- O -[{α- l -rhamnopyranosyl-(1 → 2)}- {4- O - trans - p -methoxycinnamoyl}-β- d -fucopyranosyl] qui…
Involvement of Bax and Bcl-2 in induction of apoptosis by essential oils of three Lebanese Salvia species in human prostate cancer cells
2018
Prostate cancer is one of the most common forms of cancer in men, and research to find more effective and less toxic drugs has become necessary. In the frame of our ongoing program on traditionally used Salvia species from the Mediterranean Area, here we report the biological activities of Salvia aurea, S. judaica and S. viscosa essential oils against human prostate cancer cells (DU-145). The cell viability was measured by 3(4,5-dimethyl-thiazol-2-yl)2,5-diphenyl-tetrazolium bromide (MTT) test and lactate dehydrogenase (LDH) release was used to quantify necrosis cell death. Genomic DNA, caspase-3 activity, expression of cleaved caspase-9, B-cell lymphoma 2 (Bcl-2) and Bcl-2 associated X (Ba…
Relaxant activity of three aporphine alkaloids from Annona cherimolia on isolated aorta of rat.
1995
Abstract In the present study we tested the relaxant effect of three aporphine alkaloids—roemerine, anonaine and dehydroroemerine—isolated from the roots of Annona cherimolia, on isolated strips of rat thoracic aorta. All compounds completely relaxed KCl- and noradrenaline-induced contractions with different potencies depending on their structural characteristics. The experiments, carried out in Ca2+-free medium using two different agonists (noradrenaline and caffeine) which mobilize calcium intracellularly by different mechanisms of action, showed that the alkaloids made no contribution to intracellular calcium processes. The present study provides evidence that the relaxant effects produc…
Inhibition of Trypanosoma cruzi by plant extracts used in Chinese medicine.
2004
In this work, we assessed the effect of extracts obtained from 17 plants used in traditional Chinese medicine. These extracts were tested in vitro with the epimastigote form of Trypanosoma cruzi, clone Bra C(15) C(2), at 27 degrees C in F-29 medium at a concentration of 100 microg/ml in axenic cultures. Allopurinol was used as reference drug. Seven plant extracts showed inhibitory activities lower than 25%. Pueraria lobata, Mahonia beaei, Dictamus dasycarpus, Kochia scoparia, Sophora flavescens and Ligustrum lucidum showed effects with inhibition values between 25% and 60%, whereas Lithospermum erythrorhizon, Saussurea lappa, Melia toosendan and Cinnamomum cassia showed the greatest inhibit…
Tone perception in Mandarin-speaking school age children with otitis media with effusion.
2017
Objectives The present study explored tone perception ability in school age Mandarin-speaking children with otitis media with effusion (OME) in noisy listening environments. The study investigated the interaction effects of noise, tone type, age, and hearing status on monaural tone perception, and assessed the application of a hierarchical clustering algorithm for profiling hearing impairment in children with OME. Methods Forty-one children with normal hearing and normal middle ear status and 84 children with OME with or without hearing loss participated in this study. The children with OME were further divided into two subgroups based on their severity and pattern of hearing loss using a h…
Representation and Processing of Lexical Tone and Tonal Variants: Evidence from the Mismatch Negativity
2015
Pronunciation variation is ubiquitous in the speech signal. Different models of lexical representation have been put forward to deal with speech variability, which differ in the level as well as the nature of mental representation. We present the first mismatch negativity (MMN) study investigating the effect of allophonic variation on the mental representation and neural processing of lexical tones. Native speakers of Standard Chinese (SC) participated in an oddball electroencephalography (EEG) experiment. All stimuli have the same segments (ma) but different lexical tones: level [T1], rising [T2], and dipping [T3]. In connected speech with a T3T3 sequence, the first T3 may undergo allopho…
Inhibition of Trypanosoma cruzi growth by medical plant extracts
2002
This study describes the screening of extracts obtained from 18 plants and two fungi used in the Chinese and Mediterranean traditional medicines on epimastigote forms of Trypanosoma cruzi. The extracts were tested against epimastigote of T. cruzi Bra C15C2 clone in vitro at 27 degrees C and at a concentration of 250 microg/ml in axenic culture. Angelica dahurica, A. pubescens, A. sinensis, Astragalus membranaceus, Coptis chinensis, Haplophyllum hispanicum, Phellodendron amurense, Poria cocos, Ranunculus sceleratus and Scutellaria baicalensis showed significant effects against the parasite with a percentage of growth inhibition between 20 and 100%. C. chinensis and R. sceleratus showed the g…
Burning mouth syndrome: is acupuncture a therapeutic possibility?
2010
Burning mouth syndrome is a chronic pathology of unknown ethiopathogenesis. The aim of this study was to evaluate whether acupuncture can produce a reduction of the burning sensation by influencing the oral microcirculation. METHODS: Thirty patients (10 male and 20 female; mean age +/- SD = 65.4 +/- 2.17) and 30 healthy subjects (10 male and 20 female; mean age +/- SD = 62.06 +/- 6.72) were recruited for the study. The patients were treated with acupunctural techniques based on traditional Chinese medicine. Microcirculation was observed in vivo using videocapillaroscopy at three different times: t(0)) in the absence of acupuncture; t(1)) 1 minute after the insertion of the needles; and t(2)…
Ricerca educativa in ambienti multiculturali con allievi cinesi: la lingua scritta come ponte per un avvio informale al pensiero algebrico-relazionale
2017
Il contributo, evidenziando l’attuale proble- matica didattica relativa alla multiculturalità nel panorama scolastico nazionale, discute alcuni aspetti chiave della cultura cinese, uti- li ad interpretare il perché di particolari competenze algebriche, evidenziate negli allievi di area confuciana dagli insegnanti di tutti i gradi scolastici, coerenti con le valuta- zioni internazionali PISA e TIMMS. Con questo scopo, il lavoro propone nello specifico una riflessione epistemologica del rapporto tra lingua scritta cinese e avvia- mento informale al pensiero algebrico-rela- zionale e discute i dati sperimentali (di tipo implicativo) di una ricerca-azione condotta in classi di Scuola Primaria c…
Cultural diversity: how can it increases the complexity of teaching mathematics in multicultural class? The case of Chinese students
2015
The paper, examining the increasing presence of different culture students in Italy, discusses the didactical problematic of multiculturalism at School. In particular a possible “comparison” between East (China, Korea and Japan) and West mathematical epistemology is presented through a historical and linguistic cultural approaches. Some evidences of analogies and differences between the cognitive styles of Chinese and Italian learners in mathematics are presented as examples to show the complexity of teaching/learning mathematics in multicultural classroom