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PubMed Journals Articles About "Global Chinese Ethyl Aceto Acetate Acetal Industry 2017" RSS

21:06 EDT 20th June 2018 | BioPortfolio

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Showing "Global Chinese Ethyl Aceto Acetate Acetal Industry 2017" PubMed Articles 1–25 of 12,000+

The progress of Chinese surgery in 2017.

The article outlined the speeches of Surgeon Branch during the Annual Scientific Conference of Chinese Medical Association in 2018.From the perspectives of inheritance, innovation, standardization and improvement, it summarizes the major progress of Chinese surgery in 2017 and introduces the objectives and action plans of Chinese Medical Association Branch of Surgery this year.


The use of warmed ethyl vinyl acetate in reassembling skeletal remains.

Fragmentation of skeletal material is a common occurrence in archaeological excavations and during forensic investigations. Traditionally the reconstruction of skeletal fragments has relied on the use of adhesive tapes, waxes and glues. The application of warmed ethyl vinyl acetate or EVA enables precise anatomical location without damage to the skeletal material. If reversal is required, the EVA can be removed without damage. This inexpensive technique will enhance the capabilities of research investigator...

Inhibition of UVB-induced pro-inflammatory cytokines and MMP expression by Zanthoxylum rhetsa bark extract and its active constituent hesperidin.

The antiphoto aging property of Zanthoxylum rhetsa obtained from Pangkor Island, Malaysia, was evaluated. Solvent fractions of different polarity obtained from the methanolic extract of the bark material were initially tested for anticollagenase and antielastase activities. The ethyl acetate fraction showed bioactivity against the protease enzymes. Hence, it was subjected to further purification via column chromatography, to yield a major constituent, hesperidin. Subsequently, the ethyl acetate fraction and...


Evaluation of mosquito larvicidal activity of fruit extracts of Acacia auriculiformis against the Japanese encephalitis vector Culex vishnui.

The larvicidal potentiality of crude and ethyl acetate extracts of fruits of Acacia auriculiformis was investigated against all the larval instars of JE vector Culex vishnui. The crude extracts showed good results against all the larval instars with highest mortality at 0.09%. Highest mortality was found at 300 ppm of ethyl acetate extract. Lowest LCvalue was obtained at 72 h for third instar larvae. Non target organisms tested, showed no to very less mortality to ethyl acetate solvent extract. Presence o...

Ethyl-acetate fraction of Trichilia catigua protects against oxidative stress and neuroinflammation after cerebral ischemia/reperfusion.

Trichilia catigua A. Juss (Meliaceae) preparations have been used in folk medicine to alleviate fatigue, stress, and improve memory. Antinociceptive, antiinflammatory, and in vitro neuroprotective effects have been observed in animals. Cerebral ischemia/reperfusion (I/R) leads to severe neuropsychological deficits that are largely associated with oxidative stress, inflammation and neurodegeneration. We reported previously that an ethyl-acetate fraction (EAF) of T. catigua reduced brain ischemia-induced lear...

Separation of three polar compounds from Rheum tanguticum by high-speed counter-current chromatography with an ethyl acetate/glacial acetic acid/water system.

The separation of polar compounds by high-speed counter-current chromatography is still regarded as a challenge. In this study, an efficient strategy for the separation of three polar compounds from Rheum tanguticum has been successfully conducted by using high-speed counter-current chromatography. X-5 macroporous resin chromatography was used for the fast enrichment of the target compounds. Then, the target fraction was directly introduced into high-speed counter-current chromatography for separation using...

Proceedings of the 2017 International Forum on Gonococcal Infections and Resistance (2017 IFGIR) in Shenzhen, China.

The 2017 International Forum on Gonococcal Infections and Resistance (2017 IFGIR) was held at Shenzhen, China from 17 to 19 September 2017. The key objectives were to gather experts in the field to review and analyze the epidemiological profiles of gonococcal infections and antimicrobial resistance (AMR) at global, regional and national levels; to share and discuss findings from ongoing and completed research studies; and to identify research needs to respond to the spread of gonococcal infections and AMR. ...

An UPLC-MS/MS method for simultaneous determination of five flavonoids from Stellerachamaejasme L. in rat plasma and its application to a pharmacokinetic study.

Stellerachamaejasme L. has been used as a Traditional Chinese Medicine for the treatment of scabies, tinea, stubborn skin ulcers, chronic tracheitis, cancer and tuberculosis. A sensitive and selective ultra-high liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed and validated for the simultaneous determination of five flavonoids (stelleranol, chamaechromone, neochamaejasmin A, chamaejasmine and isochamaejasmin) of Stellerachamaejasme L. in rat plasma. Chromatographic separation...

Ru-Catalyzed Chemoselective Olefin Migration Reaction of Cyclic Allylic Acetals to Enol Acetals.

A Ru-catalyzed olefin migration reaction of chiral cyclic allylic acetal is reported. The reaction generates cyclic enol acetal in a highly chemoselective manner. A variety of O,O- and N,O-acetals participated in the reaction with conservation of the stereochemical integrity of the acetal moiety. The utility of the reaction was demonstrated by the short and protective group-free syntheses of (L)-deoxyribonucleoside and β-amicetose glycoside.

Assessment of Multiple Solvents for Extraction and Direct GC-MS Determination of the Phytochemical Inventory of Sansevieria Extrafoliar Nectar Droplets.

Considerable effort has been devoted to analytical determinations of sugar and amino acid constituents of plant nectars, with the primary aim of understanding their ecological roles, yet few studies have reported more exhaustive organic compound inventories of plant nectars or extrafoliar nectars. This work evaluated the efficacy of four solvents (ethyl acetate, dichloromethane, toluene and hexane) to extract the greatest number of organic compound classes and unique compounds from extrafoliar nectar drops ...

Terminalia ferdinandiana Exell. Fruit and Leaf Extracts Inhibit Proliferation and Induce Apoptosis in Selected Human Cancer Cell Lines.

Terminalia spp. are characterized by their high antioxidant contents and several species have anticancer activity. This study examined T. ferdinandiana fruit and leaf extracts for antiproliferative and apoptotic activities against a panel of human carcinoma cell lines. All extracts inhibited Caco2, HeLa, Jeg-3, JAR, MC3T3-E1, and MG63 proliferation. The leaf ethyl acetate extract was the most potent inhibitor of proliferation (MC3T3-E1 IC = of 6 µg/ml; Caco2 IC = 102 µg/ml). Furthermore, IC's < 500 µg...

Multiple pharmacological approaches on Fibigia eriocarpa extracts by in vitro and computational assays.

The ethyl acetate, methanolic, and water extracts of Fibigia eriocarpa were assessed for a panoply of bioactivities. Total phenolic and flavonoid content were quantified as well as individual phenolic compounds by HPLC-DAD. The in-vitro antioxidant and enzyme (acetylcholinesterase (AChE), butyrylcholinesterase (BChE), tyrosinase, α-amylase, and α-glucosidase) inhibitory potential of the extracts were evaluated. In silico molecular docking was used to investigate possible interaction between dominant compo...

Antibacterial Activities of Endophytic Bacteria Isolated from Taxus brevifolia Against Foodborne Pathogenic Bacteria.

Endophytes are a potential source of novel bioactive compounds with medicinal properties. In this study, 41 endophytic bacteria (EB) were isolated from tissues of a medicinally important plant Taxus brevifolia (Pacific yew). The objective was to screen all the EB isolates for their antibacterial effects against five foodborne pathogenic bacteria: Bacillus cereus ATCC10876, Staphylococcus aureus ATCC12600, Listeria monocytogenes ATCC19115, Escherichia coli ATCC43890, and Salmonella Typhimurium ATCC19585. Amo...

Isolation and antiproliferative activity of triterpenoids and fatty acids from the leaves and stem of Turraea vogelii Hook. f. ex benth.

Chloroform extract from the leaves of Turraea vogelii Hook f. ex Benth demonstrated cytotoxic activity against a chronic myelogenous leukemia cell, K-562 with ICof 14.27 μg/mL, while chloroform, ethyl acetate and methanol extracts from the stem of the plant inhibited K-562 cells growth with ICof 19.50, 24.10 and 85.40 μg/mL respectively. Bioactive chloroform extract of Turraea vogelii leaves affords two triterpenoids: oleana-12,15,20-trien-3β-ol (1), and oleana-11,13-dien-3β,16α,28-triol (2), with si...

Influence of direct and sequential extraction methodology on metabolic profiling.

A systematic comparison was made of the detected metabolite profiles for two plant materials (black beans and soybeans) and a dietary supplement (black cohosh) extracted using sequential (hexane, ethyl acetate, and 50% aqueous methanol) and direct extraction with three solvent systems (80% aqueous methanol, methanol/chloroform/water (2.5:1:1, v/v/v) and water). Extracts were analyzed by LC-MS (without derivatization) and GC-FID (with BSTFA/TMCS derivatizations). For sequential extraction, HPLC-UV and BSTFA/...

Trace anti-inflammatory β-carboline alkaloid identified in Arenaria kansuensis by two-dimensional chromatography coupled with UniElut C18AEX based solid-phase extraction re-enrichment technology.

Traditional Chinese medicine is important for discovery of drug precursors. However, information about trace chemical composition of them is very limited due to the lack of appropriate enrichment and chromatographic purification methods In our work, A. kansuensis was taken as an example, a novel two-dimensional reversed-phase/hydrophilic interaction liquid chromatography coupled with UniElut C18AEX solid-phase extraction re-enrichment method based on anti-inflammatory bioactivity-guided assay was developed ...

Simultaneous quantification of twelve compounds in ethyl acetate extracts of Euphorbia kansui before and after fry-baked with vinegar by UPLC-MS/MS and its toxic effect on zebrafish.

The dried roots of Euphorbia kansui T.N. Liou ex T.P. Wang have been traditionally used for edema in China. However, the severe toxicity caused by Euphorbia kansui has seriously restricted its clinical application. Therefore, in order to study the material basis of the toxicity attenuation effect of processing with vinegar, a rapid, sensitive, validated and reliable UPLC-MS/MS method was developed to determine twelve compounds in ethyl acetate extracts of Euphorbia kansui before and after fry-baked with vin...

Chinese consensus on chronic gastritis (2017, Shanghai).

Since the Chinese Consensus on Chronic Gastritiswas established at the National Chronic Gastritis Symposium in Shanghai in November 2012, the Kyoto global consensus report on Helicobacter pylori gastritis(hereinafter referred to as the Kyoto consensus), which emphasizes both the role of Helicobacter pylori (H. pylori) and the classification and staging system for chronic gastritis based on the operative link for gastritis assessment (OLGA)and even the operative link for gastric intestinal metaplasia assessm...

Effect of high pressure treatment and short term storage on changes in main volatile compounds of Chinese liquor.

Changes in main volatile compounds of Chinese liquor after high pressure (HP) treatment and following short term storage were investigated. 400 MPa-15 min & 400 MPa-30 min were applied to young liquor. Results from gas chromatography (GC) analysis revealed decreasing trends in alcohols, aldehydes and ethyl acetate immediately after HP treatments, which was in consistent with those in natural aging process; but no significant change was found in acids. However, differences in main volatile compounds between ...

Global transcriptomic analysis of Rhodococcus erythropolis D310-1 in responding to chlorimuron-ethyl.

Chlorimuron-ethyl is a typical long-term residual sulfonylurea herbicide whose long period of residence poses a serious hazard to rotational crops. Microbial degradation is considered to be the most acceptable method for its removal, but the degradation mechanism is not clear. In this work, we investigated gene expression changes during the degradation of chlorimuron-ethyl by an effective chlorimuron-ethyl-degrading bacterium, Rhodococcus erythropolis D310-1. The genes that correspond to this degradation an...

PCR Screening of Antibiotic Resistance Genes in Faecal Samples from Australian and Chinese Children.

Recent public awareness campaigns on the risk of antibiotic resistance in pathogenic microbes has placed pressure on governments to enforce stricter antimicrobial stewardship policies on the hospital and agricultural industry. This study aimed to screen faecal samples from Australian and Chinese children for the presence of antibiotic resistance genes to identify demographics at risk of carriage of these genes and examine antimicrobial stewardship policies from the two countries which may influence carriage...

Chinese Protocol of Diagnosis and Treatment of Colorectal Cancer.

Colorectal cancer is one of the most common malignant tumors in China. In 2012 one million thirty six thousand cases of colorectal cancer were diagnosed all over the world, two hundred fifty three thousand cases were diagnosed in China (accounted for 18.6%). China has the largest number of new cases of colorectal cancer in the world. Colorectal cancer has becoming a serious threat of Chinese residents' health. In 2010, the National Ministry of Health organized colorectal cancer expertise of the Chinese Medi...

Factors Influencing Mating Behavior and Success in the Red Palm Weevil, Rhynchophorus ferrugineus Olivier (Coleoptera: Dryophthoridae).

The effects of body size, age, feeding and mating status, conspecific volatiles from live adults, synthetic aggregation pheromone, and a pheromone synergist, ethyl acetate, on the mating behavior of red palm weevil, Rhynchophorus ferrugineus Olivier, were investigated. To evaluate these factors, variables such as mating latency, frequency and duration, and refractory period were assessed. While both, body size and age, influenced the mating behavior, the latter showed a stronger effect. The large males reco...

Stability of Ethyl Glucuronide, Ethyl Sulfate, Phosphatidylethanols and Fatty Acid Ethyl Esters in Postmortem Human Blood.

The lack of systematic studies on the stability of ethanol's non-oxidative metabolites in postmortem specimens restricts their use in forensic cases. This study aimed to compare the stability of ethyl glucuronide (EtG), ethyl sulfate (EtS), phosphatidylethanols (PEths) and fatty acid ethyl esters (FAEEs) in postmortem human blood.

Simultaneous quantification of five biflavonoids in rat plasma by LC-ESI-MS/MS and its application to a comparatively pharmacokinetic study of Selaginella doederleinii Hieron extract in rats.

Selaginella doederleinii Hieron is a widely used as folk Chinese medicine for treatment of different cancers. Our previous investigations have confirmed that the total biflavonoids in ethyl acetate extract from S. doederleinii (SDEA) have favorable anticancer potentials. However, the in vivo process of its bioactive ingredients remains unknown. In this paper, a sensitive and reliable method was developed for simultaneous quantification of main five biflavonoids, including amentoflavone, robustaflavone, 2″...


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