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Copyright of University Chemistry is the property of Peking University, College of Chemistry & Molecular Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of University Chemistry is the property of Peking University, College of Chemistry & Molecular Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of University Chemistry is the property of Peking University, College of Chemistry & Molecular Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Brewing is the property of China Brewing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Plant alcohol extract is a natural active substance extracted from an alcohol solution. The extraction method is simple and the extraction efficiency is high, plant alcohol extract rich in flavonoids and polyphenols, which plays anti-inflammatory, antioxidant, anti-tumor and antibacterial effects. The paper reviews the extraction process of plant alcohol extract, their biological effects and potential mechanisms, to provide reference for application of plant alcohol extract in animal husbandry. [ABSTRACT FROM AUTHOR]

Copyright of China Brewing is the property of China Brewing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chinese Institute of Food Science & Technology is the property of Journal of Chinese Institute of Food Science & Technology Periodical Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background Stroke, as a major chronic non-communicable disease, seriously affects the health of the nation and imposes a heavy burden on patients, families and society. Alcohol consumption is common in China, and there is a close relationship between alcohol intake and stroke incidence, but the relationship between alcohol intake and stroke incidence is still controversial. Objective To investigate the relationship between alcohol intake and risk of stroke. Methods PubMed, Web of Science, Cochrane Library, Embase, CNKI, VIP, Wanfang Data, and SinoMed were searched for prospective cohort studies on the relationship between alcohol intake and risk of stroke from inception to December 2023. Literature screening, data extraction, and literature quality evaluation were performed independently by 2 researchers. Stata/MP 17.0 was used for dose-response meta-analysis. Results A total of 16 papers with 548 595 study subjects were included. Meta-analysis results showed that alcohol intake was associated with the risk of stroke (RR=1.17, 95%CI=1.10-1.26, P40 g increased the risk of stroke by 35% (RR=1.35, 95%CI=1.23-1.49, P

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan University of Science & Technology, Natural Science is the property of Editorial Office of Journal of Henan University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In the process of drilling operation, most of the strata encountered during drilling are shale strata. The borehole wall instability caused by shale hydration has always plagued scholars and engineers. Compared with oil-based drilling fluid, water-based drilling fluid has the advantages of low cost and low emission pollution, so the development demand of efficient water-based drilling fluid system has been very high. Low activity water-based drilling fluid uses activity regulator to reduce the activity of water-based drilling fluid, so as to achieve anti sloughing effect. Based on the anti sloughing mechanism of low activity drilling fluid, i.e. Dunan equilibrium theory, this paper summarizes the application of low activity water-based drilling fluid and the types and application of activity regulators, evaluates all kinds of activity regulators, and finally looks forward to the development of activity regulator in the future. [ABSTRACT FROM AUTHOR]

Metabolomics of biological sample has been a hot topic in the field of mass spectrometry in recent years. The components of biological samples are complex, among which alcohols are very important. Alcohol metabolites mainly include fatty alcohols, sugars, phenols, glycerides and sterols. These metabolites undertake crucial physiological functions in vivo. However, due to the low polarity of most alcohol metabolites and the lack of ionizable groups, their research is relatively less than other types of metabolites such as amines and acids in mass spectrometry field. Chemical derivatization is a powerful sample pre-treatment technology, which through the design of organic chemical reagents targeting a functional group to react with the metabolites of interest in the sample, so as to load the derivatization reagent group into the molecular skeleton of the analyte. The addition of derivatization reagent group can change the physicochemical properties of the analyte, greatly improve its ionization efficiency in mass spectrometry. As a result, a rapid and sensitive method for the detection of metabolites can be established. The application of chemical derivatization technology in the detection and analysis of alcohol metabolites by mass spectrometry can greatly improve their mass spectrometry behavior, and offer help for the physiological and pathological research of alcohol metabolites. With the consistent efforts of researchers, mass spectrometry derivatization methods for alcohol metabolites are emerging, and these proposed methods have been applied into various types of mass spectrometry instruments, including gas chromatography-mass spectrometry (GC-MS), liquid chromatography-mass spectrometry (LC-MS), matrix assisted laser desorption mass spectrometry (MALDI-MS) and direct analysis mass spectrometry. The limit of detection (LOD) and limit of quantification (LOQ) of alcohol metabolites were also significantly reduced by the establishment of various mass spectrometry derivatization methods. In this paper, the chemical derivatization reactions for alcohol metabolites published in recent years were summarized, and the qualitative and quantitative methods and rapid screening methods for alcohol metabolites based on these derivatization reactions were briefly introduced. [ABSTRACT FROM AUTHOR]

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Brewing is the property of China Brewing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] The present paper aimed to explore the genetic trend of apricot of aromatic substances. [Method ]We extracted and separated aromatic substances in new strains'Zl0-1-78' and'Zl0-1-60' apricot fruits, and their parents'Chuanzhihong' and' Fengyuanhong' apricot fruits at commercial stages and ripe stages, by headspace solid-phase microextraction and gas chromatography-mass spectrometry. Then we compared the spectra with NISTll database. The relative content of aromatic substances was determined by area normalization method. [Result] The result showed that 72 aromatic components were detected in the fruits of four apricot varieties (lines), including 20 kinds of alcohols, 18 kinds of esters, 14 kinds of ketones, 5 kinds of acids, 4 kinds of alkanes, enes and aldehydes, 1 kind of benzene, phenols and naphthalene. The number of aromatic substances components was the most in'Zl0-1-78', which contained 37 kinds. The contents of all aromatic components was changed with the fruit maturity, alcohols content was the highest in the male parent' Fengyuanhong' and its offspring'Zl0-1-78','Zl0-1-60' fruit at commercial stages and ripe stages. Ester content was the highest in the female parent' Chuanzhihong' at commercial stages. The most aromatic substances in the offspring'Zl0-1-78' and'Zl0-1-60' fruits inherited from their male parent' Fengyuanhong', 75. 6 % of the aromatic components in the'Zl0-1-78' fruits were consistent with that in the male parent'Fengyuanhong', and 47. 44 % of the aromatic components in the'Zl0-1-60' fruits were consistent with that in the male parent. The characteristics aroma of linalool content was the most in'Zl0-1-78' and'Zl0-1-60' and their male parent' Fengyuanhong', the values was 13 293. 33- 28 986. 67, and acetic ester in' Chuanzhihong' was the most, its value was 6230. 00. Rose scent characteristics of the offspring of the most important fruit fragrance ingredients linalyl alcohol and geraniol inherited from the parent. [Conclusion] The most important aromatic components in offspring was linalyl alcohol and geraniol, inherited from their male parent, and the content of offspring was much more than that of its male patent. Moreover, we evaluated fruit quality and provided the theory for further application demonstration. [ABSTRACT FROM AUTHOR]

[Objective] The present paper aimed to obtain the optimum cultivation period and the best harvesting time of Psammosilene tunicoides. in a year. [ Method] The contents of moisture, total ash and alcohol extract content were determined for samples with different cultivation years and different harvesting time. [ Result] The moisture, total ash and alcohol extract content of Psammosilene tunicoides. samples with different cultivation years and different harvesting time were in accordance with the relevant standards. From the second year of cultivation, the content of alcohol extract increased gradually, and increased the fastest from the second year to the third year, and harvested in October was the highest. ( Conclusion) In Lijiang city, Yunnan province, the optimum cultivation period was 3 years and the best harvesting time of Psammosilene tunicoides. in a year was in October. [ABSTRACT FROM AUTHOR]

The phenomenon of drinking is almost universal，and due to the unique drinking culture China has become the hardest hit area for alcoholic diseases. Alcohol can cause damage to a variety of tissues. Long-term heavy drinking causes bone metabolism disorders，loss of bone mass，and deterioration of bone microstructure，resultsing in increased bone fragility and increased risk of fracture and osteonecrosis. In this paper，the effects of alcohol on bone tissue cells，cellular pro-inflammatory factors，oxidative stress，estrogen，parathyroid hormone-vitamin D and related pathways were reviewed. The relationship between alcohol and bone metabolism was summarized. The mechanism of alcohol-induced bone injury was summarized. [ABSTRACT FROM AUTHOR]

In order to reveal the puff-by-puff release behavior of ester and alcoholic monomer flavors from filter tow of demi-slim cigarettes, the transfer rules of representative esters and alcoholic monomer flavors during smoking of demi-slim cigarettes were studied using ultrasonic assisted extraction combined with gas chromatography (GC) method. The results showed that: 1) The puff-by-puff transfer rates of 17 esters and 13 alcoholic monomer flavors were in the range of 0.31%-20.43% and 1.54%-19.60%, respectively, with those of acetic esters and straight chain saturated alcohols being greater and those of cinnamates and unsaturated alcohols having relatively stable puff-by-puff releases. 2) For the same puff number, the puff-by-puff transfer rates of each group of homologous monomers of ester and alcoholic monomer flavors increased with increasing boiling points, and those of each group of isomeric monomer flavors increased with increasing molecular structural stability. 3) Puff-by-puff transfer rates of ester and alcoholic monomer flavors increased with proceeding puff, and there was a good linear positive correlation between the cumulative puff-by-puff transfer rates and puff numbers. [ABSTRACT FROM AUTHOR]

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The catalytic graphitization of furan resin carbon by lanthanum has been investigated in this paper. A definite volume of lanthanum chloride ethanol solution was dispersed throughout furan resin. The resulting resin was cured at 180 °C for 2 h, followed by carbonization under Ar atmosphere at about 600 °C for 1 h. The resin carbon containing lanthanum was then heat treated at different temperatures. The extent of graphitization of the samples was examined by X-ray diffraction (XRD). The 2θ value was obtained from the centroid of the (002) diffraction peaks and the mean crystallite size (Lc) and interlayer spacing (d002) were calculated using the Scherrer equation and the Bragg equation respectively. The morphology of furan resin carbon was investigated by scanning electron microscopy. The results indicate that lanthanum has a good catalytic activity for the graphitization of furan resin carbon. The extent of graphitization increases with the increase of lanthanum content, and the minimum value of d002 is 0.3360 nm at HTT = 2400°C and 18 wt% lanthanum. Additionally, the related catalytic mechanism for the graphitization of furan resin carbon by lanthanum was also discussed. [ABSTRACT FROM AUTHOR]

In this paper, monodispersed ZnO microspheres in sizes from 50 to 200 nm were synthesized with a developed two-step method. In the primary reaction, ethanol suspension of ZnO nanoparticles was prepared, and monodispersed ZnO microspheres were synthesized in the secondary reaction by adding the ZnO nanoparticles suspension into the reaction solution. Diameter of the ZnO microspheres could be controlled by varying the volume of QDs suspension added. The transmission microscopy images and X-ray diffraction patterns of the ZnO microspheres showed that no matter their diameters, the ZnO microspheres were formed by aggregation of well crystallized ZnO nanoparticles. The polydispersity indexes (PDI) of ZnO microspheres were detected. It is found that PDI values of the microspheres were all less than 1.0, suggesting the monodispersity of the ZnO microspheres. The PDI value was only 0.16 when the diameter of the ZnO microspheres was 150 nm. [ABSTRACT FROM AUTHOR]

Lemon peel, which was dried at 60 °C, was used as the raw materials in this study. Experiments of extraction with microwave for total flavonoids of lemon peel were planned by response surface methodology. The effects of alcohol concentration, ratio of solution to solid and microwave processing time on the extraction rate were studied. The best conditions of extraction with microwave were obtained. When the ethanol concentration was 60% , the ratio of solution to solid was 30 and the extraction time was 4 min, the extraction rate reached the maximum. Under this condition, 3 paralleled experiments were carried out. The results showed that the extraction rates of total flavonoids of lemon peel were high and the experiments with good reproducibility; the average extraction rate was 1.20%. This paper may have a certain reference value for the extraction of active ingredient of natural products. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

At present, a majority of corrosion inhibitors applying in oilfield mainly consist of organic amine compounds. In order to understand and control the organic amine content of corrosion inhibitors and give full play to corrosion inhibitors effect, it is very important to determine accurately the organic amine content of corrosion inhibitors. In this paper, the amine value of three organic corrosion inhibitors with hydrochloric and ethanol method, high chlorine acid non-aqueous titration method by different acid-base indicators and solvents were contrastively analyzed. The experimental results show that titration end point change is a cute, accurate, and fast with appropriate addition amount of corrosion inhibitor. [ABSTRACT FROM AUTHOR]

Copyright of Mycosystema is the property of Mycosystema Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)