Log in

Relevant bibliographies by topics / Acetyl group

Contents

Journal articles
Dissertations / Theses
Book chapters
Conference papers

Academic literature on the topic 'Acetyl group'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Acetyl group.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Acetyl group"

1

Rosenqvist, Marie. "Acetyl Group Distribution in Acetylated Wood Investigated by Microautoradiography." Holzforschung 55, no. 3 (April 25, 2001): 270–75. http://dx.doi.org/10.1515/hf.2001.045.

Full text

Abstract:

Summary Sapwood of Scots pine (Pinus silvestris L.) was acetylated with 14C- and 3H-labelled acetic anhydride. The distribution of acetyl groups was investigated with microautoradiography and microautoradiographs were evaluated with ESEM, Environmental Scanning Electron Microscopy. The investigation showed that the impregnation of wood with radioisotope-labelled substances provides a good opportunity to investigate the location of substances covalently bonded to the wood material. Introduced 14C-labelled acetyl groups show an even distribution in the wood cell wall, with no discernible concentration gradients at acetylation levels of about 5, 15 and 20% weight gain. 3H-labelled acetyl groups show an even distribution in the wood cell wall at 15 and 20% weight gain, with no discernible concentration gradients. At the 5% weight gain level, however, an uneven distribution of 3H-labelled acetyl groups over the cell wall is observed. Nevertheless, the unevenness is random and no concentration gradient is discernible at this level. 3H with a relatively high resolution, 0.5–1 μm, compared to 14C with a resolution of 2–5 μm, gives more accurate information about where exactly the acetyl groups are situated in the wood cell wall. Acetic anhydride was evenly distributed when a full impregnation procedure was used. The chemical and physical properties of acetic anhydride allow a uniform penetration into the pine cell wall and a complete acetylation takes place when the specimens are heated.

APA, Harvard, Vancouver, ISO, and other styles

2

Romanova, Dariya A., David L. Avetyan, Maxim L. Belyanin, and Elena V. Stepanova. "Synthesis of Salicaceae Acetyl Salicins Using Selective Deacetylation and Acetyl Group Migration." Journal of Natural Products 83, no. 4 (March 19, 2020): 888–93. http://dx.doi.org/10.1021/acs.jnatprod.9b00570.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Weinhouse, Sidney. "The Acetyl Group in Fatty Acid Metabolism." FASEB Journal 9, no. 9 (June 1995): 820–21. http://dx.doi.org/10.1096/fasebj.9.9.7601346.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Anteunis, M., and M. van Montagu. "Locked acetyl group in N(6)-acetylcytidine." Bulletin des Sociétés Chimiques Belges 74, no. 11-12 (September 2, 2010): 481–87. http://dx.doi.org/10.1002/bscb.19650741102.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Tang, Ai Min, and Kai Wang. "Study on Esterification Characteristics of TEMPO-Oxidized Cellulose." Advanced Materials Research 749 (August 2013): 49–53. http://dx.doi.org/10.4028/www.scientific.net/amr.749.49.

Full text

Abstract:

Oxidized cellulose acetate (OCA) with carboxylic acid group on C-6 position of glucose is a kind of biodegradable functional materials which can be dissolved in organic solvents. First, cellulose was oxidized with TEMPO (2, 2, 6, 6-tetramethyl-piperidyl-1-oxyl) oxidation system, and then OCA was produced via esterification by reacting the oxidized cellulose with acetic anhydride. The influence factors such as carboxylic content of oxidized cellulose, reaction temperature, reaction time, and concentration of acetic anhydride on degree of substitution (DS) of acetyl group and intrinsic viscosity ([η]) of OCA were investigated. The result revealed that the DS of acetyl group can be increased effectively from 2.61 to 2.74 by increasing reaction temperature from 50°C to 80°C, and from 2.58 to 2.72 by prolonging reaction time from 40min to 180min, but the [η] of the product decreased at the same time. An increase in concentration of acetic anhydride led to an increase in DS and [η] of OCA. As the carboxyl content increased from 0.383 mmol/g to 0.797 mmol/g, the DS of acetyl group decreased from 2.81 to 2.73. That result revealed the carboxyl content also has a great influence on the esterification characteristics.

APA, Harvard, Vancouver, ISO, and other styles

6

Putman, C. T., L. L. Spriet, E. Hultman, M. I. Lindinger, L. C. Lands, R. S. McKelvie, G. Cederblad, N. L. Jones, and G. J. Heigenhauser. "Pyruvate dehydrogenase activity and acetyl group accumulation during exercise after different diets." American Journal of Physiology-Endocrinology and Metabolism 265, no. 5 (November 1, 1993): E752—E760. http://dx.doi.org/10.1152/ajpendo.1993.265.5.e752.

Full text

Abstract:

Pyruvate dehydrogenase activity (PDHa) and acetyl group accumulation were examined in human skeletal muscle at rest and during exercise after different diets. Five males cycled at 75% of maximal O2 uptake (VO2 max) to exhaustion after consuming a low-carbohydrate diet (LCD) for 3 days and again 1-2 wk later for the same duration after consuming a high-carbohydrate diet (HCD) for 3 days. Resting PDHa was lower after a LCD (0.20 +/- 0.04 vs. 0.69 +/- 0.05 mmol.min-1.kg wet wt-1; P < 0.05) and coincided with a greater intramuscular acetyl-CoA-to-CoASH ratio, acetyl-CoA content, and acetylcarnitine content. PDHa increased during exercise in both conditions but at a lower rate in the LCD condition compared with the HCD condition (1.46 +/- 0.25 vs. 2.65 +/- 0.23 mmol.min-1.kg wet wt-1 at 16 min and 1.88 +/- 0.20 vs. 3.11 +/- 0.14 at the end of exercise; P < 0.05). During exercise muscle acetyl-CoA and acetylcarnitine content and the acetyl-CoA-to-CoASH ratio decreased in the LCD condition but increased in the HCD condition. Under resting conditions PDHa was influenced by the availability of fat or carbohydrate fuels acting through changes in the acetyl-CoA-to-CoASH ratio. However, during exercise the activation of PDHa occurred independent of changes in the acetyl-CoA-to-CoASH ratio, suggesting that other factors are more important.

APA, Harvard, Vancouver, ISO, and other styles

7

Polnaya, Febby J., Hilda Hilda, and Cynthia G. C. Lopulalan. "KONSENTRASI ASAM ASETAT MEMENGARUHI KARAKTERISTIK FISIKOKIMIA PATI SAGU IHUR TERASETILASI." Jurnal Teknologi dan Industri Pangan 31, no. 2 (December 2020): 180–87. http://dx.doi.org/10.6066/jtip.2020.31.2.180.

Full text

Abstract:

Native ihur sago starch is a starch from Maluku and to date there is no report on its physicochemical properties. The objective of this work was to evaluate the effect of acetic acid concentration on the physicochemical properties of the native ihur sago starch. The starch was acetylated at different acetic acid concentrations, i.e., 0, 0.5, 1.5, and 2.5%. The acetylation was carried out by reacting ihur sago starch solution (100 g in 225 mL water) with acetic acid under alkaline condition. The acetyl group, degree of substitution (DS), water solubility, swelling power, paste clarity, and water, ash and amylose contents of the acetylated starch were measured. The study was conducted in three replications of non-factorial experiments using a completely randomized design. Starch modification through acetic acid addition produced ihur sago starch with different physicochemical characteristics from that of its native form. The acetylation caused the hydroxyl group in the starch to be substituted by acetyl group at concentration of 1.336-1.850% and DS range of 0.026-0.046, whilst no acetyl group was detected in its native starch. Acetylation increased the starch ash content from 0.46% to 0.50-0.57%, amylose content from 28.86% to 29.73-31.46%, solubility from 12.83% to 14.20-25.20%, swelling power from 18.51 g/g to 16.74-28.24 g/g and paste clarity from 93.07%T650 to 93.50-94.13%T650. In addition, acetylation at 0.5% increased the water content of the starch while higher concentration of acetylation could decrease its water content.

APA, Harvard, Vancouver, ISO, and other styles

8

Liepa, AJ, AJ Liepa, TC Morton, and TC Morton. "Acetal Formation Facilitated in 2-Hydroxyaryl Aldehydes by Intramolecular Acyl Group Transfer." Australian Journal of Chemistry 39, no. 11 (1986): 1747. http://dx.doi.org/10.1071/ch9861747.

Full text

Abstract:

Convenient preparations of synthetically useful acetals, a dithioacetal and an oxathiolan from the 2-acyl derivatives of 2-hydroxyaryl aldehydes under basic conditions are described. The mildness of the reaction conditions is illustrated by the formation of an ethoxycarbonyl -substituted dioxolan . The reaction is dependent upon an intramolecular acetyl group transfer and the mechanism of the reaction is discussed. Some broader implications of this type of acyl transfer are discussed.

APA, Harvard, Vancouver, ISO, and other styles

9

Vannuruswamy, Garikapati, Mashanipalya G. Jagadeeshaprasad, K. Kashinath, Suresh K. Kesavan, Shweta Bhat, Arvind M. Korwar, Ashok D. Chougale, Ramanamurthy Boppana, D. Srinivasa Reddy, and Mahesh J. Kulkarni. "Molecules with O-acetyl group protect protein glycation by acetylating lysine residues." RSC Advances 6, no. 70 (2016): 65572–78. http://dx.doi.org/10.1039/c6ra11313c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Jones, Andrew M., and Katrien Koppo. "CHASING THE ???GHOST??? OF THE ACETYL GROUP DEFICIT." Medicine & Science in Sports & Exercise 37, no. 1 (January 2005): 163. http://dx.doi.org/10.1249/01.mss.0000149776.64754.48.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Acetyl group"

1

Appleton, Martin Lee. "Part 1, NMR assignments of acetyl and trityl groups in derivatized carbohydrates via proton-carbon long-range couplings ; Part 2, the conformational equilibria of 1,2,3,4-tetra-O?-acetyl-?-D-ribopyranose and 1,2,3,4-tetra-O?-acetyl-?-D-xylopyranose /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487591658173866.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Wang, Tao. "The organometallic chemistry of ambident aceton dianions : reactions with Group 4 and 14 element dihalides." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36516.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Bakhtiari, Davood. "Thermal coefficients of methyl groups within ubiquitin and metabolic coupling of NAA and lactate in cortical neurons." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2013. http://hdl.handle.net/11858/00-1735-0000-0001-BC06-D.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Syu, Wun-Shuo, and 許紋碩. "Synthesis and Photophysics of 4-thienyl/furyl-triphenylamine main structural DSSC dyes with rhodanine-3-acetic acid and cyanoacetic acid as anchoring group." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/14138011350032514096.

Full text

Abstract:

碩士
國立臺灣科技大學
化學工程系
104
In this research, a series of organic sensitizers based on diphenyl (4-thiophen/furan-2-yl)aniline structure has been synthesized for dye-sensitized solar cells (DSSCs). We have prolonged the donor and used different anchoring groups as the acceptor in the Donor-π bridge-Acceptor system. This D-π-A system has the results in the increase of the maximum band to visible light region due to increasing intramolecular charge transfer from donor to acceptor and has better regulation of the electronic energy levels. Those eight organic dyes were synthesized by Suzuki coupling reaction and Knoevenagel condensation reaction. We used triphenylamine structure as donor, thiophene and furan as π bridge, cyanoacrylic acid and rhodanine-3-acetic acid as acceptors. Use nuclear magnetic resonance spectroscopy (NMR) and mass spectroscopy (MASS) to identify the structures and measure UV / Visible spectroscopy and Cyclic voltagram to discuss the photophyscial and electrochemical properties.

APA, Harvard, Vancouver, ISO, and other styles

5

Wang, Chen-Hsiang, and 王振翔. "Synthesis and Characterization of a Novel Coumarin-based Organic Dye with an end group of ( 5-methylene-4-oxo-2-thioxothiazolidine-3-yl ) acetic acid for Dye-sensitized Solar Cells." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/30289875927784364325.

Full text

Abstract:

碩士
國立臺灣科技大學
化學工程系
97
We reported here on the synthesis and photophysical properties of a novel coumarin-based organic dye (15) as well as its application dye coated PTFE-framed TiO2 solar cell (DSSC). The key step of the synthesis of new coumarin-based organic dye (15) as shown in scheme 1, is condensation reaction of 2-Amino-5-bromobenzenethiol (3) and 3,3,3-triethoxypropionic ethyl ester (5) to give the corresponding (6-Bromo-benzothiazol-2-yl)-acetic acid ethyl ester (6) in the presence of acetic acid and THF as solvent. Subsequent condensation with 8-hydroxy-1,1,7,7–tetramethyl-2,3,6,7- tetrahydro-1H,5H-pyrido[3,2,1-ij]quinoline-9-carbaldehyde (9) gave 9- (6-Bromo-benzothiazol-2-yl)-1,1,6,6-tetramethyl-2,3,5,6-tetrahydro-1H,4H-11-oxa-3a-aza-benzo[de]anthracen-10-one (10). Suzuki coupling reaction of the intermediate (10) with 2-thienyl-boronic acid in the presence of Pd(PPh3)4 gave 1,1,6,6-tetramethyl-9-(6-thiophen-2–yl- benzothiazol-2-yl)-2,3,5,6-tetrahydro-1H,4H-11-oxa-3a-aza-benzo[de] anthracen-10-one (12), following Cyanation with KCN in DMF provided (13). Intermediate (14) was synthesized from (13) by the Vilsmeyer-Haack reaction. An ethanolic solution including (14) and rhodanine-N-acetic acid was refluxed in the presence of piperidine for 24h. Purification of the resulting precipitates by column chromatography to give deep violet solids of the coumarin dye with an end group of (5-methylene-4-oxo-2- thioxothiazolidin-3-yl) acetic acid (15). The power conversion efficiency of 0.28 to 2.84% was attained under AM 1.5 irradiation (100mW/cm2). This preliminary work suggests that the molecular-designed coumarin dye is promising in the application of DSSC.

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Acetyl group"

1

Martin, Robert. "Aromatic ketones containing at least one acetyl group and one other acyl group." In Handbook of Hydroxyacetophenones: Preparation and Physical Properties, 949–66. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-2291-3_12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Martin, Robert. "Aromatic Ketones Containing At Least One Acetyl Group and One Other Acyl Group." In Aromatic Hydroxyketones: Preparation and Physical Properties, 1627–45. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-1-4020-9787-4_21.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Martin, Robert. "Phenols with One Benzoyl Group and One or Several Acetyl Groups (Class of ETHANONES)." In Aromatic Hydroxyketones: Preparation and Physical Properties, 523–28. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-1-4020-9787-4_5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Martin, Robert. "Phenols with one benzoyl group and one or several acetyl groups (Class of ETHANONES)." In Handbook of Hydroxybenzophenones, 487–92. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4347-9_6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Rozen, Shlomo. "The Versatile Chemistry of Acetyl Hypofluorite: The First Hypofluorite Not Bonded to a Polyhaloalkyl Group." In Efficient Preparations of Fluorine Compounds, 139–45. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118409466.ch24.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Greenhaff, Paul L., and James A. Timmons. "Pyruvate Dehydrogenase Complex Activation Status and Acetyl Group Availability as a Site of Interchange between Anaerobic and Oxidative Metabolism during Intense Exercise." In Advances in Experimental Medicine and Biology, 287–98. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4899-1928-1_26.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Martin, Robert. "Aromatic ketones containing only acetyl groups." In Handbook of Hydroxyacetophenones: Preparation and Physical Properties, 887–948. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-2291-3_11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Martin, Robert. "Aromatic Ketones Containing Only Acetyl Groups." In Aromatic Hydroxyketones: Preparation and Physical Properties, 1559–625. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-1-4020-9787-4_20.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Johannsen, L., H. Labischinski, and P. Giesbrecht. "Degradability by Lysozyme of Staphylococcal Cell Walls as a Function of O-Acetyl Groups." In Biological Properties of Peptidoglycan, edited by Peter H. Seidl and Karl H. Schleifer, 191–96. Berlin, Boston: De Gruyter, 1986. http://dx.doi.org/10.1515/9783110874297-024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

"Acetyl Group." In Encyclopedia of Genetics, Genomics, Proteomics and Informatics, 11. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6754-9_117.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Acetyl group"

1

Powers, P. J., M. Gent, R. Jay, J. Hirsh, M. Levine, and G. Turpie. "DEEP VEIN THROMBOSIS PROPHYLAXIS IN SURGICALLY TREATED FRACTURED HIP PATIENTS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643692.

Full text

Abstract:

Deep vein thrombosis is a major complication in'patients treated surgically for fractured hip. Methods employed toreduce the risk of thrombosis include dextran, ASA, warfarin, low or adjusted dose heparin and calf compression, but none has widespread acceptance.A randomized trial wascarried out to assess the effectiveness of sodium warfarinand acetyl salicylic acid(aspirin) compared to placebo inthe prevention of venous thrombosis in fractured hip patients. One hundred and ninty four patients were randomizedto receive warfarin (65 patients), ASA (66 patients) or placebo (63 patients).Prophylaxis commenced post operatively and continued for 21 days or until discharge, if earlier.Warfarin patients received 10 mg sodium warfarin orally as soon as possible after surgery. Warfarin was then given daily according to the prothrombin time (PT), to obtain a PT of 16 seconds on the 5th post operative day. The PT was maintain at 16 to 18 seconds until the end of treatment.ASA and placebo patients received enteric coated tablets, 650 mg twice daily, in a double blind fashion beginning as soon as possible post operatively and continuingto the end of treatment. Surveillance testing and I-fibrinogen leg scanning and impedance plethysmography was performed and venography was done if either test suggested thrombus at the popliteal vein or above. Otherwise venography was performed at day 21 or prior to discharge, if earlier. Venous thrombosis occurred in 13 patients (20%) in the warfarin group, 27 patients (^0.9%) in the ASA group, and 29 patients (46%) in the placebo group (P=0.005). Proximal vein thrombosis or pulmonary embolism occurred in 6patients (9.2%) in the warfarin group,7 patients (10.6%) in the ASA and 19 patients (30.2%) in the placebo group (P=0.002). Two major hemorrhages occurred in the warfarin group, none in the ASA group, and 2 in the placebo group.The results of this study show sodium warfarin to be safeand effective in reducing thromboembolic complications infractured hip patients and ASA to be effective in reducing thrombosis involving the proximal deep veins of the lower limbs in these patients.

APA, Harvard, Vancouver, ISO, and other styles

2

Eldor, A., M. Bar-Ner, L. Wasserman, Y. matzner, Z. Fuks, and I. Viodavsky. "HEPARIN AND NON-ANTICOAGULANT HEPARINS INHIBIT HEPARANASE ACTIVITY IN NORMAL AND MALIGNANT CELLS:POSSIBLE THERAPEUTIC USE IN PREVENTION OF EXTRAVASATION AND DISSEMINATION OF BLOOD BORNE CELLS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643664.

Full text

Abstract:

Degradation of vascular subendothelium occurs in_vivo during the process of inflammation and tumor invasion. Various observations suggest that the capacity of some blood-borne cells to extravasate may depend in part on their ability to express hepara-nase activity. Incubation of human platelets, human nc-utrophils, or highly metastatic mouse lymphoma cells with sulfate-labeled extracellular matrix (ECM) results in heparanase mediated release of labeled heparan sulfate cleavage fragments (0.5<Kav<0.85 on Sepharose 5B) (J. Clin.Invest. 74: 1842 and 76: 1306; Cancer Res. 43: 2704). The present study was undertaken to test the heparanase inhibitory effect of heparin and non-anticoagulant species of heparin that might havea potential therapeutic use in preventing heparanase mediated extravasation ofblood-borne cells. We prepared totallyor N-desulfated heparins which were either left with their N-position exposed or were subsequently N-acetylated or N-resulfated. These heparins exhibited less than 5% of the anticoagulant activityof native heparin. It was found that total desulfation of heparin abolished its heparanase inhibitory activity whether desulfation was followed by N-acetylation or not. Inhibitory effect was restored by resulfation of the N-position. When only the N-sulfate group was desulfated, inhibitory activity was lost but could be restored by acetylation of the N-position. These results indicate that N-sulfate groups of heparin are necessary for its heparanase inhibitory activity but can be substituted by an acetyl group provided that the 0-sulfate groups are retained. Low Mr heparins (main Mr species of 2500 and 4500 daltons) and heparin fragments as small as the tetrasaccharide inhibited degradation of heparan sulfate in the ECM, albeit to a lower extent than native heparin. Similar effects of the different heparins were observed with heparanase activities from platelets, neutrophils and lymphoma cells. Preliminary in vivo experiments suggest that non-anticoagulant heparins interfere with tumor metastasis and experimental autoimmune diseases (some heparins were kindly provided by Inst. Choay, Paris and Kabi Vitrum, Stockholm).

APA, Harvard, Vancouver, ISO, and other styles

3

Mardiguian, J. "IS PENTASACCHARIDE THE SMALLEST HEPARIN OLIGOSACCHARIDE WITH BINDING AFFINITY TO ANTITHROMBIN III ? AN OVERVIEW." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644849.

Full text

Abstract:

The binding of heparin to antithrombin III is ascribed to the presence in the heparin molecule of a specific binding site which contains a typical 3-0- sulfate group located on a glucosamine residue. It has been postulated that the smallest heparin oligosaccharide capable of high affinity binding to antithrombin III and eliciting anti-factor Xa activity is a pentasaccharide containing three glucosamine units and two uronic acid residues. Such a pentasaccharide has been recently isolated after chemical depolymerization of pig mucosal heparin and its structure found to be very close to that of a synthetic pentasaccharide prepared by other investigators. However no convincing data have, so far, excluded the possibility that an oligosaccharide composed of less than five sugar units could not be able to bind to antithrombinlll and to elicit anti-factor Xa activity. We report now the isolation of new oligosaccharides obtained by beta-eliminative chemical depolymerization of heparin using three different procedures : depolymerization of heparin benzyl ester (1) in aqueous medium and (2) in non-aqueous medium: (3) alcaline depolymerization of a periodate oxydized acetyl heparin. The data reported show that the high affinity oligosaccharides isolated after affinity chromatography on immobilized antithrombin III are distinct from the previously isolated pentasaccharide and that there is some evidence that these are tetrasaccharides resulting from the cleavage of the non reducing end of the heparin molecule

APA, Harvard, Vancouver, ISO, and other styles

4

Wang, Liyuan, Xiaoxiao Zhai, and Yongen Huo. "Novel 193-nm positive photoresist composed of ester acetal polymer without phenyl group." In Advanced Lithography, edited by Qinghuang Lin. SPIE, 2007. http://dx.doi.org/10.1117/12.711703.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Nurrochmawati, Ike, Ambar Dwi Retnoningrum, and Remita Yuli Kusumaningrum. "Effect of Health Education with Flip Chart and Video on Knowledge about Early Detection of Cervical Cancer in Women of Reproductive Age in Nganjuk District, East Java." In The 7th International Conference on Public Health 2020. Masters Program in Public Health, Universitas Sebelas Maret, 2020. http://dx.doi.org/10.26911/the7thicph.02.36.

Full text

Abstract:

Background: Cervical cancer is the fourth most prevalent cancer in women. Pap smear and visual inspection acetic acid (VIA) are essential screening tests to early detect cervical cancer. However, the use of screening tests remained low among women of reproductive age in Nganjuk district, East Java. This study aimed to determine the effectiveness of health education using flip chart and video on knowledge about early detection of cervical cancer among women of reproductive age in Nganjuk district, East Java. Subjects and Method: A randomized control trial conducted in Rejoso, Nganjuk, East Java, from October to November 2019. A sample of 120 women of reproductive age was randomized into two groups: (1) Experiment group that received health education using a flip chart and video, and (2) Control group that received no intervention. The dependent variable was knowledge of early detection of cervical cancer. The independent variable was health education using a flip chart and video. The data were collected using questionnaire. The data were analyzed by independent t-test. Results: After the intervention, knowledge about early detection of cervical cancer in the experimental group (Mean= 80.40; SD= 10.54) was higher than the control group (Mean= 70.53; SD= 9.68), and it was statistically significant (p <0.001). Conclusion: Health education using a flip chart and video is effective in improving knowledge about early detection of cervical cancer among women of reproductive age. Keywords: early detection, cervical cancer, health education, women of reproductive age Correspondence: Ike Nurrochmawati. School of Health Sciences Satria Bhakti, Nganjuk. Jl. Panglima Sudirman VI, Nganjuk, East Java. Email: ike.nurrochma@gmail.com. Mobile: +6282141578108. DOI: https://doi.org/10.26911/the7thicph.02.36

APA, Harvard, Vancouver, ISO, and other styles

6

Park, Joo Hyeon, Seong-Ju Kim, Ji-Hong Kim, Dong-Chul Seo, Ki-Dae Kim, Sun-Yi Park, and Hosull Lee. "Chemically amplified negative-tone deep-UV photoresist based on poly(alkoxy styrenes) containing acetal groups." In SPIE's 1996 International Symposium on Microlithography, edited by Roderick R. Kunz. SPIE, 1996. http://dx.doi.org/10.1117/12.241826.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Mertesdorf, Carlo, Norbert Muenzel, Heinz E. Holzwarth, Pasquale A. Falcigno, Hans-Thomas Schacht, Ottmar Rohde, Reinhard Schulz, et al. "Structural design of ketal and acetal blocking groups in two-component chemically amplified positive DUV resists." In SPIE's 1995 Symposium on Microlithography, edited by Robert D. Allen. SPIE, 1995. http://dx.doi.org/10.1117/12.210382.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Ohno, Nobuyoshi, Sobahan Mia, Soichiro Nagao, Yoshitaka Tamura, Shigeki Morita, Hiroshi Shiomi, and Shingo Obara. "Behavior of Advanced Space Lubricant Under Impact Load." In STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41049.

Full text

Abstract:

The squeeze film formation ability of advanced space lubricant is studied under impact load by falling bearing steel ball against a flat anvil made of mild steel. Two synthetic base oils (PFPE815Z and MAC2001A) and six greases (600EF, 601EF, 602EF, R2000, ML and MU) are investigated for the EHL dimple film thickness and a breakdown of lubricant film under elastic-plastic impact. The results showed that the viscosity of the base oil 815Z, which contains the acetal group, was decreased by the high shear rate under the EHL squeeze action. To prevention of surface damage under impact load, EHL dimple film thickness is shallow, and becomes as efficient as the grease of which oil film formation is high. From the viewpoint, MU-G and ML-G are good.

APA, Harvard, Vancouver, ISO, and other styles

9

Gronewegen, W. A., S. Heptinstall, W. Loesche, and P. Spangenberg. "EFFECTS OF FEVERFEW EXTRACT AND PARTHENOLIDE ON PLATELET SECRETION." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643441.

Full text

Abstract:

Feverfew (Tanacetum parthenium) is used for prophylaxis of migraine and it had been suggested that the plant may have antithrombotic potential. We have prepared extracts from the leaves of feverfew and have demonstrated inhibition of 14C-5HT secretion in platelet-rich plasma induced by the phorbol ester PMA, l-oleoyl-2-acetyl-sn-glycerol (OAG), arachidonic acid, the thromboxane analogue U46619, adrenaline, collagen and ADP. The effects of a solution of parthenolide (an∝-methylenebutyro-lactone isolated from feverfew) were determined in parallel. Both feverfew extract (FE) and parthenolide inhibited 14C-5HT release in a concentration-dependent manner and the effectiveness depended on the nature of the aggregating agent used. Both FE and parthenolide were most effective as inhibitors of the secretion induced by PMA and OAG. When we compared the concentrations of FE and parthenolide which gave 50% inhibition of secretion for all the agents tested, a good correlation was found (r= 0.936). Further studies showed that feverfew extract and parthenolide inhiMt release of β-thromboglobulin from platelets as well as 14C-5HT. FE did not cause liberation of LDH. Inhibition of secretion by FE appears to be irreversible since washing platelets after treatment did not restore secretory activity.The structure of parthenolide suggests that it can alkylate sulphydryl (SH) groups. When agents containing SH groups (e.g. cysteine) were added to FE, anti-secretory activity was reduced. We also obtained a considerable decrease in the number of acid-soluble SH groups in platelets treated with feverfew extract or parthenolide at concentrations which inhibit secretion. However there was a less marked decrease in the number of acid-insoluble SH groups. FE itself does not induce formation of disulphide-linked proteins but such proteins were formed when platelets were activated in the presence of FE, probably as a result of decreased glutathione levels.We conclude that parthenolide or parthenolide-like compounds are responsible for the anti-secretory effects of FE, and that alkylation of sulphydryl groups in platelets may be involved.

APA, Harvard, Vancouver, ISO, and other styles

10

Chung, Yoon-Sik, Hyun-Jin Kim, Sook H. Cho, Dong H. Lee, Kwang H. Im, Yun-Gill Yim, Deog-Bae Kim, and Jae-Hyun Kim. "Insertion effects of various acid sensitive groups into acetal-type polymer on the profile of 248-nm chemically amplified resist." In SPIE's 27th Annual International Symposium on Microlithography, edited by Theodore H. Fedynyshyn. SPIE, 2002. http://dx.doi.org/10.1117/12.474266.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!