解剖学和形态学
麻醉学
听力与言语-语言病理学
行为科学
心脏和心血管系统
细胞和组织工程学
临床神经病学
危重症监护医学
牙科,口腔外科和医学
皮肤病学
急诊医学
内分泌学和新陈代谢
肠胃学和肝脏学
老人病学和老年医学
卫生保健科学和服务
血液学
免疫学
传染病
综合和补充性医学
医学伦理学
医学信息学
医学实验室技术
医学,全科和内科
医学,法律
医学,研究和试验
神经系统科学
护理
营养学和饮食学
产科医学和妇科医学
肿瘤学
眼科学
整形外科学
耳鼻喉科学
病理学
儿科学
周围血管疾病
药理学和药剂学
生理学
基本医疗保健
精神病学
公共、环境和职业卫生
放射学,核医学和医学成像
康复学
生殖生物学
呼吸系统
风湿病学
运动科学
外科学
毒理学
热带医学
泌尿学和肾脏学
病毒学
老年医学
健康政策和服务
心理学,临床
abstract::In recent years, different classes of proteins have been reported to promote toxic effects when ingested. Type-2 ribosome-inactivating proteins (RIPs) are a group of chimeric proteins built up of an A-chain with RNA N-glycosidase activity and a B-chain with lectin activity. These proteins are thought to play a role in...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.09.012
更新日期:2008-12-01 00:00:00
abstract::Vanadium-dependent peroxidase activity in extracts of Ascophyllum nodosum growing in the intertidal region close to Roscoff/France, and algal vanadium levels, followed approximately similar seasonal variation, as deduced from a study lasting from April 2005 to March 2006. High peroxidase (PO) activity was found in ext...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.09.004
更新日期:2008-11-01 00:00:00
abstract::Nine pregnane glycosides containing peroxy functions in their sugar moieties (1-5 and 11-14), five oligosaccharides (6-10), six pregnane glycosides (15-20), and five cardiac glycosides (21-25) were isolated from the root barks of Periploca sepium Bge. (Asclepiadaceae) and the roots of Periploca forrestii Schltr. (Ascl...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.08.015
更新日期:2008-11-01 00:00:00
abstract::In its natural environment, the plant cuticle, which is composed of the biopolymer cutin and a mixture of surface and embedded cuticular waxes, experiences a wide variety of temperatures and hydration states. Consequently, a complete understanding of cuticular function requires study of its thermal and mechanical prop...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.08.016
更新日期:2008-11-01 00:00:00
abstract::A method is described for the enrichment of odd very-long-chain polyunsaturated fatty acids (VLCPUFAs) by means of RP-HPLC and argentation TLC from total fatty acids of the dinoflagellate A. carterae and their identification as picolinyl esters by means of microbore liquid chromatography-mass spectrometry with atmosph...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.08.021
更新日期:2008-11-01 00:00:00
abstract::Three phenolic glycosides were isolated together with two known flavonol glycosides from the H2O-soluble fraction of rhizomes of Kaempferia parviflora. Their structures were determined to be rel-(5aS,10bS)-5a,10b-dihydro-1,3,5a,9-tetrahydroxy-8-methoxy-6H-benz[b]indeno[1,2-d]furan-6-one 5a-O-[alpha-L-rhamnopyranosyl-(...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.09.001
更新日期:2008-11-01 00:00:00
abstract::There are several factors thought to assist invasive weeds in colonization of ecosystems. One of these factors is allelopathy, the negative effect of chemicals produced by one plant on neighboring plants, frequently mediated through root exudates and other plant leachates. Acroptilon repens (Asteraceae) is one of the ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.07.015
更新日期:2008-10-01 00:00:00
abstract::This review summarizes all reports on sesquiterpene lactones and their immediate precursors from the Cichorieae (Lactuceae) tribe of the Asteraceae. A total of 360 compounds have been reported from this tribe. The reported substances belong to three classes of sesquiterpenoids: guaianolides (243 compounds), eudesmanol...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/j.phytochem.2008.06.013
更新日期:2008-09-01 00:00:00
abstract::Five pregnane glycosides were isolated from Caralluma tuberculata (1-5), in addition to a known one (russelioside E, 6). The structures of the isolated compounds were elucidated by the analysis of NMR data and FAB-MS experiments. All the isolated compounds were tested for their antimalarial and antitrypanosomal activi...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.05.017
更新日期:2008-08-01 00:00:00
abstract::C6-aldehydes, such as (Z)-3-hexenal, (E)-2-hexenal, and n-hexanal, are volatile compounds formed by hydroperoxide lyase (HPL) and found in most terrestrial plants. They are fungicidal and bactericidal compounds, and are also signaling compounds to induce defense responses in plants. Transgenic plants having overexpres...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.04.023
更新日期:2008-08-01 00:00:00
abstract::Plants perceive biotic stimuli by recognising a multitude of different signalling compounds originating from the interacting organisms. Some of these substances represent pathogen-associated molecular patterns, which act as general elicitors of defence reactions. But also beneficial microorganisms like rhizobia take a...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.04.019
更新日期:2008-07-01 00:00:00
abstract::Eight sesquiterpenes, including four guaiane-types containing an interesting epoxy unit (1-4), a rare tricyclic carbon skeleton-type (5) and three eudesmane-types (6-8), along with five known compounds, were isolated from rhizomes of Atractylodes lancea. The structures and relative configurations of 1-8 were determine...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.04.008
更新日期:2008-07-01 00:00:00
abstract::The allene oxide cyclase (AOC) catalyzes the formation of cis-(+)-12-oxophytodienoic acid, an intermediate in jasmonate biosynthesis and is encoded by a single copy gene in tomato. The full length AOC promoter isolated by genome walk contains 3600 bp. Transgenic tomato lines carrying a 1000 bp promoter fragment and th...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.03.007
更新日期:2008-06-01 00:00:00
abstract::Telomeres are nucleoprotein structures ensuring the stability of eukaryotic chromosome ends. Two protein families, TRFL (TFL-Like) and SMH (Single-Myb-Histone), containing a specific telobox motif in their Myb domain, have been identified as potential candidates involved in a functional nucleoprotein structure analogo...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.04.001
更新日期:2008-06-01 00:00:00
abstract::A phytochemical study of the asteraceous herb Pulicaria crispa (Forssk.) Oliv. resulted in the characterisation of three guaianolide sesquiterpenes, 2alpha,4alpha-dihydroxy-7alphaH,8alphaH,10alphaH-guaia-1(5),11(13)-dien-8beta,12-olide (1), 1alpha,2alpha-epoxy-4beta-hydroxy-5alphaH,7alphaH,8alphaH,10alphaH-guaia-11(13...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.03.012
更新日期:2008-06-01 00:00:00
abstract::Cholestane glycosides, dioseptemlosides A (1) and B (2), together with six spirostane glycosides, dioseptemlosides C-H (3-8), were isolated from the rhizomes of Dioscorea septemloba. Their structures were established on the basis of physical data, spectroscopic analysis (HRESIMS, 1D and 2D NMR), and chemical methods. ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.12.014
更新日期:2008-04-01 00:00:00
abstract::Proteomic analyses of soybean seedlings responding to flooding were conducted to identify key proteins involved. The seeds were germinated on a spongy matrix for two days, and then subjected to flooding for three days. After flooding, the total number of roots, the length of the main root, the lengths of the lateral a...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.01.007
更新日期:2008-04-01 00:00:00
abstract::The flavonoid rich grain of buckwheat (Fagopyrum esculentum Moench, Fam. Polygonaceae) is of high nutritional value. With the aim to improve its agronomic productivity, cultivars were crossed with the wild species F. homotropicum which, however, differs in its flavonoid content. The intention of this work was to deter...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.01.001
更新日期:2008-04-01 00:00:00
abstract::Bioassay-guided fractionation against alpha-glucosidase resulted in isolation and characterization of eight active compounds from the EtOH extract of the seeds of Syagrus romanzoffiana. Of these, seven are stilbenoids, and two of them, 13-hydroxykompasinol A (1) and scirpusin C (4), possess potent inhibitory activity ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.12.004
更新日期:2008-03-01 00:00:00
abstract::Intra-specific diversity in Liularia vellerea growing in the northwestern to central Yunnan province of China was studied by chemical and genetic approaches. Samples collected in the Jianchuan, Lijiang, and Zhongdian areas contained 6,15-dioxygenated furanoeremophilanes as their major components (type A); whereas samp...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.12.001
更新日期:2008-03-01 00:00:00
abstract::We reported previously that a recombinant salicylic acid (SA) glucosyltransferase1 (AtSGT1) from Arabidopsis thaliana catalyzes the formation of both SA 2-O-beta-D-glucoside (SAG) and the glucose ester of SA (SGE). Here, transgenic Arabidopsis plants overexpressing AtSGT1 have been constructed, and their phenotypes an...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.12.010
更新日期:2008-03-01 00:00:00
abstract::Stem bark of Hippocratea excelsa afforded six pentacyclic triterpenes, five oleanane and one ursane types. They were identified as 11beta,21beta-dihydroxy-olean-12-ene-3-one (2), 3alpha,11alpha,21beta-trihydroxy-olean-12-ene (3), 3alpha,21beta-dihydroxy-11alpha-methoxy-olean-12-ene (4), 3alpha,21beta-dihydroxy-olean-9...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.10.016
更新日期:2008-02-01 00:00:00
abstract::Five cucurbitacins, kuguacins A-E (1-5), together with three known analogues, 3beta,7beta,25-trihydroxycucurbita-5,(23E)-diene-19-al (6), 3beta,25-dihydroxy-5beta,19-epoxycucurbita-6,(23E)-diene (7), and momordicine I (8), were isolated from roots of Momordica charantia. Structures of 1-5 were elucidated by NMR and MS...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.10.020
更新日期:2008-02-01 00:00:00
abstract::Sorghum SbSTS1, a pathogen inducible gene, was previously demonstrated to encode an enzyme with stilbene synthase activity. In this study, we attempt to identify the stilbene derivatives that accumulate in infected sorghum seedlings after inoculation with the anthracnose pathogen Colletotrichum sublineolum. Scanning f...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.09.012
更新日期:2008-02-01 00:00:00
abstract::A structure-activity relationships study was conducted assaying 15 natural analogues and derivatives belonging to two groups of organic compounds, nonenolides and cytochalasins, for their toxicity against the composite perennial weeds Cirsium arvense and Sonchus arvensis occurring through the temperate region of world...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.11.003
更新日期:2008-02-01 00:00:00
abstract::The cyclotides are currently the largest known family of head-to-tail cyclic proteins. The complex structure of these small plant proteins, which consist of approximately 30 amino acid residues, contains both a circular peptide backbone and a cystine knot, the combination of which produces the cyclic cystine knot moti...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.10.023
更新日期:2008-02-01 00:00:00
abstract::A phytochemical investigation of the roots of Symplocos caudata Wall (Symplocaceae) resulted in isolation and characterization of four optical isomers of a neolignan glycoside (1-4), a lignan lactone glycoside (5), a phenylpropanoid glycoside (6), as well as two known compounds (7, 8). Their structures were elucidated...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.08.022
更新日期:2008-02-01 00:00:00
abstract::From the MeOH extract of the leaves of W. japonica, seven phenylpropanoid gentiobiosides (1-7) were isolated along with eight known phenylpropanoids (8-15). Structures of 1-7 were determined based on spectroscopic data and chemical evidence. The activity of compounds 1-15 to scavenge superoxide anion radicals was inve...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.08.021
更新日期:2008-02-01 00:00:00
abstract::An in vitro aggregation of washed lutoid membrane and rubber particles, respectively, prepared from the bottom (lutoid) fraction and rubber layer of centrifuged fresh latex, leading to the formation of rubber coagulum necessary for a latex coagulation was demonstrated. A Triton X-100 extract of washed lutoid membrane ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.08.019
更新日期:2008-01-01 00:00:00
abstract::Lotus japonicus roots, cultured in a modified B5 medium, produced and secreted germination stimulants that induced Striga hermonthica seed germination. The germination-inducing activity was detected both in the roots and the culture filtrate. Following bioassay-guided purification procedures, an active compound was is...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.06.011
更新日期:2008-01-01 00:00:00
abstract::Cannabis sativa L. is the source for a whole series of chemically diverse bioactive compounds that are currently under intensive pharmaceutical investigation. In this work, hot and cold water extracts as well as ethanol/water mixtures (tinctures) of cannabis were compared in order to better understand how these extrac...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.07.018
更新日期:2008-01-01 00:00:00
abstract::The dichloromethane extract from leaves of Juniperus brevifolia, through chromatographic fractionations yield six compounds: 3beta-hydroxy-abieta-8,11,13-trien-7-one, 18-hydroxy-sandaracopimara-8(14),15-dien-7-one, sandaracopimara-8(14),15-dien-18-yl formate; and the first examples of sandaracopimaranes and abieta-8,1...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.07.026
更新日期:2008-01-01 00:00:00
abstract::The challenges and opportunities for protecting agricultural production of food and other materials will be met through exploiting the induction of defence pathways in plants to control pests, diseases and weeds. These approaches will involve processes that can be activated by application of natural products, patented...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/j.phytochem.2007.09.025
更新日期:2007-11-01 00:00:00
abstract::During the past 50 years there have been tremendous advances in chemical and biological techniques of analysis that have transformed research in pharmacognosy. The PSE has regularly held symposia of relevance to pharmacognosy and some of these are briefly reviewed in the area of natural products from higher plants. Th...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/j.phytochem.2007.06.028
更新日期:2007-11-01 00:00:00
abstract::Chemical systematics sets out to interpret the phylogenetic implications of the occurrence and distribution of secondary metabolites. In this review, a number of the major contributions from the 1960's and 1970's are identified and re-assessed in the light of recent evidence gained from DNA studies. It is shown that f...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/j.phytochem.2007.06.029
更新日期:2007-11-01 00:00:00
abstract::Biotransformation of 20(S)-protopanaxatriol (1) by the fungus Mucor spinosus AS 3.3450 gave 10 metabolites (2-10), of which 2-5 were previously known. On the basis of NMR and MS analyses, structures 6-10 were established as 12-oxo-23beta-hydroxyl-20(S)-protopanaxatriol (6), 20S,24R-epoxy-dammaran-3beta,6alpha,25-triol...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.05.028
更新日期:2007-10-01 00:00:00
abstract::Despite evidence that lignin associates under both aqueous and organic media, the magnitude and nature of the underlying driving forces are still a matter of discussion. The present paper addresses this issue by examining both solution properties and size exclusion behaviour of lignins isolated from five different spe...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.05.026
更新日期:2007-10-01 00:00:00
abstract::Two red Cystofilobasidium spp. isolated from spring sap-flows of Betula pendula were analysed for their carotenoid content. In Cystofilobasidium infirmominiatum, three unusual pigments were detected and identified by structure elucidation as oxidised torulene derivatives. These included 16'-hydroxytorulene and torular...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.05.019
更新日期:2007-10-01 00:00:00
abstract::A dynamic model for plant cell and hairy root primary metabolism is presented. The model includes nutrient uptake (Pi, sugars, nitrogen sources), the glycolysis and pentose phosphate pathways, the TCA cycle, amino acid biosynthesis, respiratory chain, biosynthesis of cell building blocks (structural hexoses, organic a...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.04.028
更新日期:2007-08-01 00:00:00
abstract::Skeletonema marinoi produces 2,4-heptadienal, 2,4-octadienal, and 2,4,7-octatrienal, the latter only in traces. In nutrient-replete cultures, the production of potentially defensive polyunsaturated aldehydes (PUA) increases from the exponential to the stationary phase of growth from 1.2 fmol cell(-1) (+/-0.4 fmol cell...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.05.012
更新日期:2007-08-01 00:00:00