Journal articles: 'Amidah'

1

Marcus, Joel. "A Jewish-Christian 'Amidah?" Early Christianity 3, no. 2 (2012): 215. http://dx.doi.org/10.1628/186870312800778220.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Schonfield, Jeremy. "Including the Matriarch in the Amidah?" European Judaism 52, no. 1 (March 1, 2019): 135–49. http://dx.doi.org/10.3167/ej.2019.520115.

Full text

Abstract:

Progressive liturgists seek to introduce gender parity into the first paragraph of the Amidah by adding the names of the Matriarchs immediately after those of the Patriarchs. I argue that this misrepresents their marriages and the role played by the concubines. A more balanced understanding is made possible by distancing the names of the Matriarchs from those of their husbands, and inserting them in the form of a brief piyyut, composed of biblical citations, just before the concluding blessing formula. The proposed insertion reflects the agency displayed by the Matriarchs and alludes obliquely to the concubines. Account is taken of the appropriateness of the piyyut for use in traditional settings.

APA, Harvard, Vancouver, ISO, and other styles

3

Smith, Sara. "The Imahot in the Amidah: A History." Contemporary Jewry 32, no. 3 (October 2012): 309–27. http://dx.doi.org/10.1007/s12397-012-9092-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Kimelman, Reuven. "The Daily 'Amidah and the Rhetoric of Redemption." Jewish Quarterly Review 79, no. 2/3 (October 1988): 165. http://dx.doi.org/10.2307/1454251.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Kimelman, Reuven. "The Messiah of the Amidah: A Study in Comparative Messianism." Journal of Biblical Literature 116, no. 2 (1997): 313. http://dx.doi.org/10.2307/3266226.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Fleischer, E. (Ezra). "On the Origins of the 'Amidah: Response to Ruth Langer." Prooftexts 20, no. 3 (2000): 380–84. http://dx.doi.org/10.1353/ptx.2000.0017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Kaunfer, Elie. "Reception of the Bible in Rabbinic Liturgy: Expression and Interpretation." Journal of the Bible and its Reception 9, no. 2 (November 1, 2022): 247–68. http://dx.doi.org/10.1515/jbr-2021-0031.

Full text

Abstract:

Abstract This essay explores two questions: How is the Bible received and expressed in classical rabbinic Jewish liturgy? What is the implication for the understanding and interpretation of Jewish prayer, given the role of the Bible in the liturgy? We will review the prevailing theories of the Bible’s reception in the liturgy and classify the different forms of this reception. We will then explore the implications for interpretation of liturgy by analyzing a piece of the daily Jewish liturgy—the first blessing of the amidah.

APA, Harvard, Vancouver, ISO, and other styles

8

Lieber, Laura S. "“On This Day, We Are Perfect”: Embodiment in Yannai’s Yom Kippur Qerova." Journal of Jewish Thought and Philosophy 30, no. 1 (March 31, 2022): 37–69. http://dx.doi.org/10.1163/1477285x-12341326.

Full text

Abstract:

Abstract This article analyzes two poetic units within a much longer composition (translated in full here) composed by Yannai (6th c. CE, Galilee) for recitation on Yom Kippur. Specifically, it offers readings of Unit 8, which prefaces the third blessing of the Amidah (the Qedushah), and Unit 15, which concludes the work. Both units dwell on the physical experience of Yom Kippur and the ways in which ritual affects the body, permitting us to consider the role of “kinesthetic theology” (borrowing Kathryn Reklis’ coinage) – i.e., how physical expression and embodied experiences not only reflect but shape belief – in the composition.

APA, Harvard, Vancouver, ISO, and other styles

9

Janse, S. "De joodse achtergrond van het gebed in Aphrahats Demonstrationes 23.53-59." NTT Journal for Theology and the Study of Religion 59, no. 1 (January 18, 2005): 41–59. http://dx.doi.org/10.5117/ntt2005.59.041.jans.

Full text

Abstract:

The prayer of the Syrian theologian Aphrahat in Demonstratio 23.53-59 displays at least seven analogies with the Jewish prayer Amidah. Textual analysis suggests that there are more instances of Jewish influence in this prayer. In this study it is considered plausible that Jewish prayers from the period after 70 AD or 135 AD, have found a way into the Christian liturgy of Syriac-speaking Persia through Jewish proselytes. It is probable that the borrowing took place in the short period between the outbreak of the persecutions in 340 under the Persian king Shapur II and the writing of Demonstratio 23 in 345.

APA, Harvard, Vancouver, ISO, and other styles

10

Jacobs, Irving. "Kingship and Holiness in the Third Benediction of the Amidah and in the Yoẓer." Journal of Jewish Studies 41, no. 1 (April 1, 1990): 62–74. http://dx.doi.org/10.18647/1510/jjs-1990.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Ahrend, Aaron. "On the Yehi Raẓon Formula in the Blessing for the New Month in the Ashkenazic Rite." AJS Review 45, no. 2 (November 2021): 229–51. http://dx.doi.org/10.1017/s0364009421000076.

Full text

Abstract:

In the early custom of Ashkenaz, on the Shabbat preceding the beginning of the month, the coming of the new month (Rosh Ḥodesh) would be announced after the reading from the Torah and before the Torah scroll was returned to the synagogue's Holy Ark. The ritual included reciting the paragraph beginning with the words mi she-‘asah nissim (may He who performed miracles) and continuing with an announcement of the timing of Rosh Ḥodesh. In the second half of the eighteenth century, an addition to the liturgy appeared before the Mi She-‘asah Nissim section: a passage beginning yehi raẓon (may it be Your will) that the Babylonian Talmud relates was recited daily by the sage Rav following the Amidah prayer. This article suggests some reasons for the addition of the passage, traces the spread of the practice of its recitation among Ashkenazic communities, and concludes with an examination and explanation of two apparently erroneous additions to the Yehi Raẓon formula.

APA, Harvard, Vancouver, ISO, and other styles

12

Samely, Alexander. "Writing in an (almost) Classical vein: the art of Targum in an Aramaic paraphrase of the Amidah." Bulletin of the John Rylands Library 75, no. 3 (September 1993): 175–264. http://dx.doi.org/10.7227/bjrl.75.3.12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Reif, Stefan C. "The Genizah and Jewish Liturgy: Past Achievements and a Current Project." Medieval Encounters 5, no. 1 (1999): 29–45. http://dx.doi.org/10.1163/157006799x00240.

Full text

Abstract:

AbstractSchechter appreciated the significance of his liturgical finds in the Genizah but important contributions were carlier made in Oxford by Adolf Neubauer, and his nephew, Adolf Büchler. Publication of such fragments progressed in Europe, and leading figures were Ismar Elbogen and Jacob Mann. In the U.S.A., Louis Finkelstein attempted to reconstruct the "original" Second Temple versions of the amidah and the grace after meals. More recently, Naphtali Wieder has analysed hundreds of fragments that permit comparisons of the Palestinian and Babylonian rites while Ezra Fleischer has questioned Joseph Heinemann's theory about the existence of equally valid alternatives of the standard prayers in the talmudic period, and produced a major monograph on Eretz-Israel customs. Note should be taken of variant methodologies, of the contributions of younger scholars, and of new theories inspired by a century of Genizah finds. One of the remaining questions, being dealt with by Reif, assesses how the physical medium has affected the development of content. Recent research traces how the single leaf evolved into the codex, how the private individual became the professional scribe, and how brief and provisional notes turned into formal, and virtually canonized, prayer-books.

APA, Harvard, Vancouver, ISO, and other styles

14

BELINELO, Valdenir José, Dorila PILÓ-VELOSO, Eduardo Euclydes de Lima e. BORGES, Dalton Luiz Ferreira ALVES, and Genuína Teixeira REIS. "Síntese e atividade fitotóxica de amidas derivadas do ácido 6alfa,7beta-di-hidroxivouacapan-17beta-óico." Eclética Química 26 (2001): 25–39. http://dx.doi.org/10.1590/s0100-46702001000100002.

Full text

Abstract:

O ácido 6alfa,7beta-di-hidroxivouacapan-17beta-óico foi isolado das sementes de Pterodon polygalaeflorus Benth (Leguminosae) e então dez novas amidas derivadas deste ácido foram preparadas. Os efeitos destas amidas na germinação de sementes de Sorghum bicolor L. e Cucumis sativus L. foram avaliados. Nove compostos, a uma concentração de 100 ppm, mostraram um efeito inibitório (5-21%) no crescimento radicular de C. sativus L.. A N-(t-butil)-6alfa,7beta-di-hidroxivouacapan-17beta-amida mostrou a maior ação inibitória (33%) para S. bicolor L.. Somente a N-benzil-6alfa,7beta-di-hidroxivouacapan-17beta-amida mostrou efeito estimulatório no crescimento radicular para C. sativus L. e S. bicolor L., de 16% e 34% respectivamente.

APA, Harvard, Vancouver, ISO, and other styles

15

UKIELSKI, RYSZARD, and MARTA PIATEK. "Preparation and some properties of multiblock copoly(amide-b-amide)s." Polimery 50, no. 11/12 (November 2005): 793–96. http://dx.doi.org/10.14314/polimery.2005.793.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Soong, Chee-Leong, Jun Ogawa, and Sakayu Shimizu. "A Novel Amidase (Half-Amidase) for Half-Amide Hydrolysis Involved in the Bacterial Metabolism of Cyclic Imides." Applied and Environmental Microbiology 66, no. 5 (May 1, 2000): 1947–52. http://dx.doi.org/10.1128/aem.66.5.1947-1952.2000.

Full text

Abstract:

ABSTRACT A novel amidase involved in bacterial cyclic imide metabolism was purified from Blastobacter sp. strain A17p-4. The enzyme physiologically functions in the second step of cyclic imide degradation, i.e., the hydrolysis of monoamidated dicarboxylates (half-amides) to dicarboxylates and ammonia. Enzyme production was enhanced by cyclic imides such as succinimide and glutarimide but not by amide compounds which are conventional substrates and inducers of known amidases. The purified amidase showed high catalytic efficiency toward half-amides such as succinamic acid (Km = 6.2 mM; k cat = 5.76 s−1) and glutaramic acid (Km = 2.8 mM;k cat = 2.23 s−1). However, the substrates of known amidases such as short-chain (C2 to C4) aliphatic amides, long-chain (above C16) aliphatic amides, amino acid amides, aliphatic diamides, α-keto acid amides, N-carbamoyl amino acids, and aliphatic ureides were not substrates for the enzyme. Based on its high specificity toward half-amides, the enzyme was named half-amidase. This half-amidase exists as a monomer with an M r of 48,000 and was strongly inhibited by heavy metal ions and sulfhydryl reagents.

APA, Harvard, Vancouver, ISO, and other styles

17

Sonke, Theo, Sandra Ernste, Renate F. Tandler, Bernard Kaptein, Wilco P. H. Peeters, Friso B. J. van Assema, Marcel G. Wubbolts, and Hans E. Schoemaker. "l-Selective Amidase with Extremely Broad Substrate Specificity from Ochrobactrum anthropi NCIMB 40321." Applied and Environmental Microbiology 71, no. 12 (December 2005): 7961–73. http://dx.doi.org/10.1128/aem.71.12.7961-7973.2005.

Full text

Abstract:

ABSTRACT An industrially attractive l-specific amidase was purified to homogeneity from Ochrobactrum anthropi NCIMB 40321 wild-type cells. The purified amidase displayed maximum initial activity between pH 6 and 8.5 and was fully stable for at least 1 h up to 60°C. The purified enzyme was strongly inhibited by the metal-chelating compounds EDTA and 1,10-phenanthroline. The activity of the EDTA-treated enzyme could be restored by the addition of Zn2+ (to 80%), Mn2+ (to 400%), and Mg2+ (to 560%). Serine and cysteine protease inhibitors did not influence the purified amidase. This enzyme displayed activity toward a broad range of substrates consisting of α-hydrogen- and (bulky) α,α-disubstituted α-amino acid amides, α-hydroxy acid amides, and α-N-hydroxyamino acid amides. In all cases, only the l-enantiomer was hydrolyzed, resulting in E values of more than 150. Simple aliphatic amides, β-amino and β-hydroxy acid amides, and dipeptides were not converted. The gene encoding this l-amidase was cloned via reverse genetics. It encodes a polypeptide of 314 amino acids with a calculated molecular weight of 33,870. Since the native enzyme has a molecular mass of about 66 kDa, it most likely has a homodimeric structure. The deduced amino acid sequence showed homology to a few other stereoselective amidases and the acetamidase/formamidase family of proteins (Pfam FmdA_AmdA). Subcloning of the gene in expression vector pTrc99A enabled efficient heterologous expression in Escherichia coli. Altogether, this amidase has a unique set of properties for application in the fine-chemicals industry.

APA, Harvard, Vancouver, ISO, and other styles

18

Gaudreault, Philippe, Christian Drouin, and Jean Lessard. "First examples of intramolecular addition of primary amidyl radicals to olefins." Canadian Journal of Chemistry 83, no. 6-7 (June 1, 2005): 543–45. http://dx.doi.org/10.1139/v05-029.

Full text

Abstract:

The first examples of intramolecular addition of primary amidyl radicals to olefins are described. Amidyl radicals were generated from N-(phenylthio)amides in refluxing benzene using a catalytic amount of 2,2′-azobis(isobutyronitrile) (5 mol%) and tributyltin hydride (~2.2 equiv.). The resulting yields of cyclic products ranged from 63% to 85%.Key words: radical cyclization, amidyl radicals, nitrogen heterocycles.

APA, Harvard, Vancouver, ISO, and other styles

19

Trott, Sandra, Sibylle Bürger, Carsten Calaminus, and Andreas Stolz. "Cloning and Heterologous Expression of an Enantioselective Amidase from Rhodococcus erythropolis Strain MP50." Applied and Environmental Microbiology 68, no. 7 (July 2002): 3279–86. http://dx.doi.org/10.1128/aem.68.7.3279-3286.2002.

Full text

Abstract:

ABSTRACT The gene for an enantioselective amidase was cloned from Rhodococcus erythropolis MP50, which utilizes various aromatic nitriles via a nitrile hydratase/amidase system as nitrogen sources. The gene encoded a protein of 525 amino acids which corresponded to a protein with a molecular mass of 55.5 kDa. The deduced complete amino acid sequence showed homology to other enantioselective amidases from different bacterial genera. The nucleotide sequence approximately 2.5 kb upstream and downstream of the amidase gene was determined, but no indications for a structural coupling of the amidase gene with the genes for a nitrile hydratase were found. The amidase gene was carried by an approximately 40-kb circular plasmid in R. erythropolis MP50. The amidase was heterologously expressed in Escherichia coli and shown to hydrolyze 2-phenylpropionamide, α-chlorophenylacetamide, and α-methoxyphenylacetamide with high enantioselectivity; mandeloamide and 2-methyl-3-phenylpropionamide were also converted, but only with reduced enantioselectivity. The recombinant E. coli strain which synthesized the amidase gene was shown to grow with organic amides as nitrogen sources. A comparison of the amidase activities observed with whole cells or cell extracts of the recombinant E. coli strain suggested that the transport of the amides into the cells becomes the rate-limiting step for amide hydrolysis in recombinant E. coli strains.

APA, Harvard, Vancouver, ISO, and other styles

20

Cheng, Hao, Yang Xiao, Chengrong Lu, Bei Zhao, Yaorong Wang, and Yingming Yao. "Synthesis and characterization of bis(amidate) rare-earth metal amides and their application in catalytic addition of amines to carbodiimides." New Journal of Chemistry 39, no. 10 (2015): 7667–71. http://dx.doi.org/10.1039/c5nj00506j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Hu, Qu-Ping, Yu-Tao Liu, Yong-Ze Liu, and Fei Pan. "Photoinduced remote regioselective radical alkynylation of unactivated C–H bonds." Chemical Communications 58, no. 14 (2022): 2295–98. http://dx.doi.org/10.1039/d1cc06885g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Kumagai, Naoya, and Masakatsu Shibasaki. "7-Azaindoline Auxiliary: A Versatile Attachment Facilitating Enantioselective C–C Bond-Forming Catalysis." Synthesis 51, no. 01 (November 30, 2018): 185–93. http://dx.doi.org/10.1055/s-0037-1610412.

Full text

Abstract:

This short review provides an overview of 7-azaindoline auxiliaries in asymmetric catalysis. 7-Azaindoline serves as a useful attachment to carboxylic acids, and the thus-formed 7-azaindoline amides are amenable to atom-economical C–C bond-forming reactions with high stereoselectivity. The attachment is used for the sake of gaining traction in promoting the reaction of interest and can be easily removed after enantioselective reactions. Both nucleophilic and electrophilic catalyses are realized with broad tolerance for functional groups, showcasing the usefulness of 7-azaindoline auxiliaries for practical and streamlined synthesis of a wide range of acyclic chiral building blocks.1 Introduction2 7-Azaindoline as a Key Auxiliary3 7-Azaindoline Amide as a Pronucleophile3.1 α-Carbon-Substituted 7-Azaindoline Amide3.2 α-Nitrogen-Substituted 7-Azaindoline Amide3.3 α-Oxygen-Substituted 7-Azaindoline Amide3.4 α-Fluorocarbon-Substituted 7-Azaindoline Amide3.5 α-Halogen-Substituted 7-Azaindoline Amide3.6 α-Sulfur-Substituted 7-Azaindoline Amide4 7-Azaindoline Amide as an Electrophile4.1 Conjugate Addition of Butenolides4.2 1,3-Dipolar Cycloaddition of Nitrones5 Transformation of 7-Azaindoline Amide6 Conclusion

APA, Harvard, Vancouver, ISO, and other styles

23

Yamaguchi, Shigenori, Hidenobu Komeda, and Yasuhisa Asano. "New Enzymatic Method of Chiral Amino Acid Synthesis by Dynamic Kinetic Resolution of Amino Acid Amides: Use of Stereoselective Amino Acid Amidases in the Presence of α-Amino-ε-Caprolactam Racemase." Applied and Environmental Microbiology 73, no. 16 (June 22, 2007): 5370–73. http://dx.doi.org/10.1128/aem.00807-07.

Full text

Abstract:

ABSTRACT d- and l-amino acids were produced from l- and d-amino acid amides by d-aminopeptidase from Ochrobactrum anthropi C1-38 and l-amino acid amidase from Pseudomonas azotoformans IAM 1603, respectively, in the presence of α-amino-ε-caprolactam racemase from Achromobacter obae as the catalyst by dynamic kinetic resolution of amino acid amides.

APA, Harvard, Vancouver, ISO, and other styles

24

Fournand, David, Frederic Bigey, and Alain Arnaud. "Acyl Transfer Activity of an Amidase from Rhodococcussp. Strain R312: Formation of a Wide Range of Hydroxamic Acids." Applied and Environmental Microbiology 64, no. 8 (August 1, 1998): 2844–52. http://dx.doi.org/10.1128/aem.64.8.2844-2852.1998.

Full text

Abstract:

ABSTRACT The enantioselective amidase from Rhodococcus sp. strain R312 was produced in Escherichia coli and was purified in one chromatographic step. This enzyme was shown to catalyze the acyl transfer reaction to hydroxylamine from a wide range of amides. The optimum working pH values were 7 with neutral amides and 8 with α-aminoamides. The reaction occurred according to a Ping Pong Bi Bi mechanism. The kinetic constants demonstrated that the presence of a hydrophobic moiety in the carbon side chain considerably decreased the K m amide values (e.g.,K m amide = 0.1 mM for butyramide, isobutyramide, valeramide, pivalamide, hexanoamide, and benzamide). Moreover, very high turnover numbers (k cat) were obtained with linear aliphatic amides (e.g.,k cat = 333 s−1 with hexanoamide), whereas branched-side-chain-, aromatic cycle- or heterocycle-containing amides were sterically hindered. Carboxylic acids, α-amino acids, and methyl esters were not acyl donors or were very bad acyl donors. Only amides and hydroxamic acids, both of which contained amide bonds, were determined to be efficient acyl donors. On the other hand, the highest affinities of the acyl-enzyme complexes for hydroxylamine were obtained with short, polar or unsaturated amides as acyl donors (e.g.,K m NH2OH = 20, 25, and 5 mM for acetyl-, alanyl-, and acryloyl-enzyme complexes, respectively). No acyl acceptors except water and hydroxylamine were found. Finally, the purified amidase was shown to bel-enantioselective towards α-hydroxy- and α-aminoamides.

APA, Harvard, Vancouver, ISO, and other styles

25

Rahman, Md Mahbubur, Guangchen Li, and Michal Szostak. "Thioesterification and Selenoesterification of Amides via Selective N–C Cleavage at Room Temperature: N–C(O) to S/Se–C(O) Interconversion." Synthesis 52, no. 07 (February 25, 2020): 1060–66. http://dx.doi.org/10.1055/s-0039-1690055.

Full text

Abstract:

The direct nucleophilic addition to amides represents an attractive methodology in organic synthesis that tackles amidic resonance by ground-state destabilization. This approach has been recently accomplished with carbon, nitrogen and oxygen nucleophiles. Herein, we report an exceedingly mild method for the direct thioesterification and selenoesterification of amides by selective N–C(O) bond cleavage in the absence of transition metals. Acyclic amides undergo N–C(O) to S/Se–C(O) interconversion to give the corresponding thioesters and selenoesters in excellent yields at room temperature via a tetrahedral intermediate pathway (cf. an acyl metal).

APA, Harvard, Vancouver, ISO, and other styles

26

Zhao, Bei, Yang Xiao, Dan Yuan, Chengrong Lu, and Yingming Yao. "Synthesis and characterization of bridged bis(amidato) rare earth metal amides and their applications in C–N bond formation reactions." Dalton Transactions 45, no. 9 (2016): 3880–87. http://dx.doi.org/10.1039/c5dt04217h.

Full text

Abstract:

Eight bis(amidato) rare-earth metal amides were successfully synthesized and well characterized, which exhibited high catalytic activities in both the direct amidation of aldehydes and the addition of amines with carbodiimine.

APA, Harvard, Vancouver, ISO, and other styles

27

Baek, Dae Heoun, Seok-Joon Kwon, Seung-Pyo Hong, Mi-Sun Kwak, Mi-Hwa Lee, Jae Jun Song, Seung-Goo Lee, Ki-Hong Yoon, and Moon-Hee Sung. "Characterization of a Thermostable d-Stereospecific Alanine Amidase from Brevibacillus borstelensis BCS-1." Applied and Environmental Microbiology 69, no. 2 (February 2003): 980–86. http://dx.doi.org/10.1128/aem.69.2.980-986.2003.

Full text

Abstract:

ABSTRACT A gene encoding a new thermostable d-stereospecific alanine amidase from the thermophile Brevibacillus borstelensis BCS-1 was cloned and sequenced. The molecular mass of the purified enzyme was estimated to be 199 kDa after gel filtration chromatography and about 30 kDa on sodium dodecyl sulfate-polyacrylamide gel electrophoresis, indicating that the enzyme could be composed of a hexamer with identical subunits. The purified enzyme exhibited strong amidase activity towards d-amino acid-containing aromatic, aliphatic, and branched amino acid amides yet exhibited no enzyme activity towards l-amino acid amides, d-amino acid-containing peptides, and NH2-terminally protected amino acid amides. The optimum temperature and pH for the enzyme activity were 85°C and 9.0, respectively. The enzyme remained stable within a broad pH range from 7.0 to 10.0. The enzyme was inhibited by dithiothreitol, 2-mercaptoethanol, and EDTA yet was strongly activated by Co2+ and Mn2+. The k cat/Km for d-alaninamide was measured as 544.4 ± 5.5 mM−1 min−1 at 50°C with 1 mM Co2+.

APA, Harvard, Vancouver, ISO, and other styles

28

Cheng, Hao, Bei Zhao, Yingming Yao, and Chengrong Lu. "Carboxylation of terminal alkynes with CO2 catalyzed by bis(amidate) rare-earth metal amides." Green Chemistry 17, no. 3 (2015): 1675–82. http://dx.doi.org/10.1039/c4gc02200a.

Full text

Abstract:

Three novel bis(amidate) rare-earth metal amides were prepared and characterized. Treatment of CO₂ with terminal alkynes obtained propiolic acids in high to excellent yields using the highest reactive Nd-based catalyst at ambient pressure.

APA, Harvard, Vancouver, ISO, and other styles

29

Bhalla, Tek Chand, and Harish Kumar. "Nocardia globerula NHB-2: a versatile nitrile-degrading organism." Canadian Journal of Microbiology 51, no. 8 (August 1, 2005): 705–8. http://dx.doi.org/10.1139/w05-046.

Full text

Abstract:

A versatile nitrile-degrading bacterium was isolated by enrichment culture from the soil of a forest near Manali, Himachal Pradesh, India, and was identified as Nocardia globerula. This organism contains 3 enzymes with nitrile-degrading activity: nitrilase, nitrile hydratase, and amidase. Nocardia globerula NHB-2 cells grown on nutrient broth supplemented with 1% glucose and 0.1% yeast extract exhibited nitrile hydratase–amidase activity specific for saturated aliphatic nitriles or amide, while addition of acetonitrile in nutrient broth yielded cells with nitrile hydratase–amidase that in addition to saturated aliphatic nitriles–amide also hydrolyzed aromatic amide. Nocardia globerula NHB-2 cultivated on nutrient broth containing propionitrile exhibited nitrilase activity that hydrolyzed aromatic nitrile and unsaturated aliphatic nitrile. The versatility of this organism in the hydrolysis of various nitriles and amides makes it a potential bioresource for use in organic synthesis.Key words: Nocardia globerula NHB-2, nitrilase, nitrile hydratase, amidase, nitrile–amide degradation.

APA, Harvard, Vancouver, ISO, and other styles

30

Dias, João CT, Rachel P. Rezende, Carlos A. Rosa, Marc-André Lachance, and Valter R. Linardi. "Enzymatic degradation of nitriles by aCandida guilliermondiiUFMG-Y65." Canadian Journal of Microbiology 46, no. 6 (June 1, 2000): 525–31. http://dx.doi.org/10.1139/w00-027.

Full text

Abstract:

Candida guilliermondii UFMG-Y65, isolated from a gold mine, was able to utilize different nitriles and the corresponding amides as sole source of nitrogen, at concentrations up to 2 M. Resting cells cultivated on YCB-acetonitrile medium showed nitrile hydrolyzing enzyme activities against acrylonitrile and benzonitrile. These enzymes were inducible and intracellular; the optimum pH was 7.0-8.0, and the optimum temperature 25°C-30°C. Liquid chromatographic analysis indicated that C. guilliermondii UFMG-Y65 metabolized 12 mM benzonitrile to 11 mM benzoic acid and 10 mM acrylonitrile to 7.9 mM acrylic acid. The results suggest that C. guilliermondii UFMG-Y65 may be useful for the bioproduction of amides and acids, and for the bioremediation of environments contaminated with nitriles.Key words: Candida guilliermondii, nitrile hydrolyzing enzyme, amidase, nitriles, amides.

APA, Harvard, Vancouver, ISO, and other styles

31

Ma, Yanling, Xinfeng Zhang, Tianmei Chen, Fulai Liu, Shuting Fang, and Rong Zeng. "A Novel Amidase Signature Family Amidase from the Marine Actinomycete Salinispora arenicola CNS-205." Journal of Biobased Materials and Bioenergy 13, no. 4 (August 1, 2019): 557–63. http://dx.doi.org/10.1166/jbmb.2019.1870.

Full text

Abstract:

We cloned a new gene from the amidase signature (AS) family, designated am , from the marine actinomycete Salinispora arenicola CNS-205. As indicated by bioinformatics analysis and site-directed mutagenesis, the AM (a gene encoding a putative amidase) protein belonged to the AS family. AM was expressed, purified, and characterised in Escherichia coli BL21 (DE3), and the AM molecular mass was determined to be 51 kDa. The optimal temperature and pH were 40 °C and pH 8.0, respectively. AM exhibited a wide substrate spectrum and showed amidase, aryl acylamidase, and acyl transferase activities. AM had high activity towards aromatic and aliphatic amides. The AM substrate specificity for anilides was very narrow, and only propanil could be used as an effective substrate. The extensive substrate range of AM indicates it may have broad potential applications in biosynthetic processes and biodegradation.

APA, Harvard, Vancouver, ISO, and other styles

32

Rajpoot, Itendra Singh, Hemant Patel, Rahul Singh Thakur, Basant Khare, Anushree Jain, Prateek Kumar Jain, and Bhupendra Singh Thakur. "Review on Molecular Modelling in Chemistry Education." Asian Journal of Dental and Health Sciences 2, no. 4 (December 15, 2022): 55–58. http://dx.doi.org/10.22270/ajdhs.v2i4.26.

Full text

Abstract:

Molecular models derived from results of quantum-chemical calculations present an important category of didactic instruments in chemistry education. These models can be used especially as tools for supporting the students’ understanding by visual learning, which can adequately address complexity of many chemical topics, incorporate appropriate didactic principles, as well as utilize the benefits brought up by the actual information technology. The proposed molecular models are non-trivial examples of didactic application of computational chemistry techniques in illustration of electron interactions in amidic group, namely the interaction of the free electron pair on the nitrogen atom with the carbonyl group and also the interaction of atoms in the amide group with other surrounding atoms in the molecule. By these molecular models it is possible to explain acid-base properties of amides applying knowledge of electron density distribution in the molecules and the resulting electrostatic potential. Presentation of the structure and properties of the amides within education is important also for the reason that amidic functions are involved in many important natural substances (e.g. proteins, peptides, nucleic acids or alkaloids), synthetic macromolecular substances (e.g. Silon) or pharmaceutical preparations (e.g. paracetamol). This paper investigated the effect of using different types of models while teaching organic chemistry on student understanding of new concepts and the spatial structure of new molecules, as well as preference of a particular model type and illustrates the possibilities of computer-assisted molecular modelling in supporting chemistry teaching and learning. Keywords: Molecular models, Acidity, Amides, Basicity, Electrostatic potential

APA, Harvard, Vancouver, ISO, and other styles

33

UKIELSKI, RYSZARD, and MARTA PIATEK. "The effect of polyamide PA12 and polyester PBT blocks' lengths on the structure and propertries of multiblock terpoly(amide-block-ester-block-amide) (TPAEA)." Polimery 52, no. 11/12 (November 2007): 848–54. http://dx.doi.org/10.14314/polimery.2007.848.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Ma, Yan-Ling, Jin-Ling Chen, Ling-Ying Xu, Ming-Kuan Cheng, Sheng Huang, Yang Liu, and Fu-Lai Liu. "Study on the Activity of a New Amidase Signature (AS) Family." Journal of Biobased Materials and Bioenergy 15, no. 1 (February 1, 2021): 112–16. http://dx.doi.org/10.1166/jbmb.2021.2022.

Full text

Abstract:

This study cloned a new amidase signature (AS) family gene from Escherichia coli (E. coii), and mainly investigated the activity of this enzyme. The protein, according to the bioinformatics analysis, belonged to the AS family. It was expressed, purified and characterized in E. coli BL21 (DE3). As a result, 40 °C and pH 8.0 were the optimum temperature and pH. It showed a wide substrate spectrum and high activity for aromatic and aliphatic amides, while with a narrow range of anilide substrate, and only propanol could be adopted as an effective substrate. Because of its wide range of substrate specificities, this will boost the applicability of amidase and make it have the potential for a wide range of applications in biosynthesis and biodegradation.

APA, Harvard, Vancouver, ISO, and other styles

35

Kolář, Karel, Rafael Doležal, Natálie Karásková, Nadezhda V. Maltsevskaya, and Šárka Křížková. "Molecular Models in Chemistry Education at University and Upper Secondary School - Structure of Amides." Chemistry-Didactics-Ecology-Metrology 24, no. 1-2 (December 1, 2019): 45–51. http://dx.doi.org/10.2478/cdem-2019-0003.

Full text

Abstract:

Abstract Molecular models derived from results of quantum-chemical calculations present an important category of didactic instruments in chemistry education in upper secondary school and, particularly, at university. These models can be used especially as tools for supporting the students’ understanding by visual learning, which can adequately address complexity of many chemical topics, incorporate appropriate didactic principles, as well as utilize the benefits brought up by the actual information technology. The proposed molecular models are non-trivial examples of didactic application of computational chemistry techniques in illustration of electron interactions in amidic group, namely the interaction of the free electron pair on the nitrogen atom with the carbonyl group and also the interaction of atoms in the amide group with other surrounding atoms in the molecule. By these molecular models it is possible to explain acid-base properties of amides applying knowledge of electron density distribution in the molecules and the resulting electrostatic potential. Presentation of the structure and properties of the amides within education is important also for the reason that amidic functions are involved in many important natural substances (e.g. proteins, peptides, nucleic acids or alkaloids), synthetic macromolecular substances (e.g. Silon) or pharmaceutical preparations (e.g. paracetamol). Molecular models then serve to support better understanding of the structure of these substances and, in relation to it, their properties.

APA, Harvard, Vancouver, ISO, and other styles

36

Piontek, Aleksandra, Elwira Bisz, Błażej Dziuk, Roman Szostak, and Michal Szostak. "Structures and energetic properties of 4-halobenzamides." Acta Crystallographica Section C Structural Chemistry 74, no. 11 (October 23, 2018): 1395–402. http://dx.doi.org/10.1107/s2053229618013463.

Full text

Abstract:

The amide bond represents one of the most fundamental functional groups in chemistry. The properties of amides are defined by amidic resonance (nN→π*C=O conjugation), which enforces planarity of the six atoms comprising the amide bond. Despite the importance of 4-halo-substituted benzamides in organic synthesis, molecular interactions and medicinal chemistry, the effect of 4-halo-substitution on the properties of the amide bond in N,N-disubstituted benzamides has not been studied. Herein, we report the crystal structures and energetic properties of a full series of 4-halobenzamides. The structures of four 4-halobenzamides (halo = iodo, bromo, chloro and fluoro) in the N-morpholinyl series have been determined, namely 4-[(4-halophenyl)carbonyl]morpholine, C11H12 XNO2, for halo = iodo (X = I), bromo (X = Br), chloro (X = Cl) and fluoro (X = F). Computations have been used to determine the effect of halogen substitution on the structures and resonance energies. 4-Iodo-N-morpholinylbenzamide crystallized with a significant distortion of the amide bond (τ + χN = 33°). The present study supports the correlation between the Ar—C(O) axis twist angle and the twist angle of the amide N—C(O) bond. Comparison of resonance energies in synthetically valuable N-morpholinyl and N-piperidinyl amides demonstrates that the O atom of the morpholinyl ring has a negligible effect on amidic resonance in the series.

APA, Harvard, Vancouver, ISO, and other styles

37

Martinez-Rodríguez, Sergio, Rafael Contreras-Montoya, Jesús M. Torres, Luis Álvarez de Cienfuegos, and Jose Antonio Gavira. "A New L-Proline Amide Hydrolase with Potential Application within the Amidase Process." Crystals 12, no. 1 (December 23, 2021): 18. http://dx.doi.org/10.3390/cryst12010018.

Full text

Abstract:

L-proline amide hydrolase (PAH, EC 3.5.1.101) is a barely described enzyme belonging to the peptidase S33 family, and is highly similar to prolyl aminopeptidases (PAP, EC. 3.4.11.5). Besides being an S-stereoselective character towards piperidine-based carboxamides, this enzyme also hydrolyses different L-amino acid amides, turning it into a potential biocatalyst within the Amidase Process. In this work, we report the characterization of L-proline amide hydrolase from Pseudomonas syringae (PsyPAH) together with the first X-ray structure for this class of L-amino acid amidases. Recombinant PsyPAH showed optimal conditions at pH 7.0 and 35 °C, with an apparent thermal melting temperature of 46 °C. The enzyme behaved as a monomer at the optimal pH. The L-enantioselective hydrolytic activity towards different canonical and non-canonical amino-acid amides was confirmed. Structural analysis suggests key residues in the enzymatic activity.

APA, Harvard, Vancouver, ISO, and other styles

38

Ryskaliyeva, Alma Kairlapovna, Murat Ergalievich Baltabayev, and Aigul Moldakhmetovna Zhubatova. "Thermochemical Properties and Regularities of Amides, Anilides, and Amidic Acids." Acta Chimica Slovenica 65, no. 1 (March 20, 2018): 127–30. http://dx.doi.org/10.17344/acsi.2017.3683.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Maximova, J. G., A. N. Gorbunova, A. S. Zorina, A. Y. Maximov, G. V. Ovechkin, and V. A. Demakov. "Transformation of Amides by Adherent Rhodococcus Cells Possessing Amidase Activity." Прикладная биохимия и микробиология 51, no. 1 (2015): 53–58. http://dx.doi.org/10.7868/s0555109914060105.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Maksimova, Yu G., A. N. Gorbunova, A. S. Zorina, A. Yu Maksimov, G. V. Ovechkina, and V. A. Demakov. "Transformation of amides by adherent Rhodococcus cells possessing amidase activity." Applied Biochemistry and Microbiology 51, no. 1 (December 21, 2014): 64–69. http://dx.doi.org/10.1134/s0003683814060106.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Kolkenbrock, Stephan, Katja Parschat, Bernd Beermann, Hans-Jürgen Hinz, and Susanne Fetzner. "N-Acetylanthranilate Amidase from Arthrobacter nitroguajacolicus Rü61a, an α/β-Hydrolase-Fold Protein Active towards Aryl-Acylamides and -Esters, and Properties of Its Cysteine-Deficient Variant." Journal of Bacteriology 188, no. 24 (October 13, 2006): 8430–40. http://dx.doi.org/10.1128/jb.01085-06.

Full text

Abstract:

ABSTRACT N-acetylanthranilate amidase (Amq), a 32.8-kDa monomeric amide hydrolase, is involved in quinaldine degradation by Arthrobacter nitroguajacolicus Rü61a. Sequence analysis and secondary structure predictions indicated that Amq is related to carboxylesterases and belongs to the α/β-hydrolase-fold superfamily of enzymes; inactivation of (His6-tagged) Amq by phenylmethanesulfonyl fluoride and diethyl pyrocarbonate and replacement of conserved residues suggested a catalytic triad consisting of S155, E235, and H266. Amq is most active towards aryl-acetylamides and aryl-acetylesters. Remarkably, its preference for ring-substituted analogues was different for amides and esters. Among the esters tested, phenylacetate was hydrolyzed with highest catalytic efficiency (k cat/Km = 208 mM−1 s−1), while among the aryl-acetylamides, o-carboxy- or o-nitro-substituted analogues were preferred over p-substituted or unsubstituted compounds. Hydrolysis by His6Amq of primary amides, lactams, N-acetylated amino acids, azocoll, tributyrin, and the acylanilide and urethane pesticides propachlor, propham, carbaryl, and isocarb was not observed; propanil was hydrolyzed with 1% N-acetylanthranilate amidase activity. The catalytic properties of the cysteine-deficient variant His6AmqC22A/C63A markedly differed from those of His6Amq. The replacements effected some changes in Km s of the enzyme and increased k cats for most aryl-acetylesters and some aryl-acetylamides by factors of about three to eight while decreasing k cat for the formyl analogue N-formylanthranilate by several orders of magnitude. Circular dichroism studies indicated that the cysteine-to-alanine replacements resulted in significant change of the overall fold, especially an increase in α-helicity of the cysteine-deficient protein. The conformational changes may also affect the active site and may account for the observed changes in kinetic properties.

APA, Harvard, Vancouver, ISO, and other styles

42

Uchiyama, Taku, and Kentaro Miyazaki. "Product-Induced Gene Expression, a Product-Responsive Reporter Assay Used To Screen Metagenomic Libraries for Enzyme-Encoding Genes." Applied and Environmental Microbiology 76, no. 21 (September 10, 2010): 7029–35. http://dx.doi.org/10.1128/aem.00464-10.

Full text

Abstract:

ABSTRACT A reporter assay-based screening method for enzymes, which we named product-induced gene expression (PIGEX), was developed and used to screen a metagenomic library for amidases. A benzoate-responsive transcriptional activator, BenR, was placed upstream of the gene encoding green fluorescent protein and used as a sensor. Escherichia coli sensor cells carrying the benR-gfp gene cassette fluoresced in response to benzoate concentrations as low as 10 μM but were completely unresponsive to the substrate benzamide. An E. coli metagenomic library consisting of 96,000 clones was grown in 96-well format in LB medium containing benzamide. The library cells were then cocultivated with sensor cells. Eleven amidase genes were recovered from 143 fluorescent wells; eight of these genes were homologous to known bacterial amidase genes while three were novel genes. In addition to their activity toward benzamide, the enzymes were active toward various substrates, including d- and l-amino acid amides, and displayed enantioselectivity. Thus, we demonstrated that PIGEX is an effective approach for screening novel enzymes based on product detection.

APA, Harvard, Vancouver, ISO, and other styles

43

Sorokin, Dimitry Y., Sander van Pelt, Tatjana P. Tourova, and Gerard Muyzer. "Microbial Isobutyronitrile Utilization under Haloalkaline Conditions." Applied and Environmental Microbiology 73, no. 17 (July 20, 2007): 5574–79. http://dx.doi.org/10.1128/aem.00342-07.

Full text

Abstract:

ABSTRACT The utilization of isobutyronitrile (iBN) as a C and N source under haloalkaline conditions by microbial communities from soda lake sediments and soda soils was studied. In both cases, a consortium consisting of two different bacterial species capable of the complete degradation and utilization of iBN at pH 10 was selected. The soda lake sediment consortium consisted of a new actinobacterium and a gammaproteobacterium from the genus Marinospirillum. The former was capable of fast hydrolysis of aliphatic nitriles to the corresponding amides and much-slower further hydrolysis of the amides to carboxylic acids. Its partner cannot hydrolyze nitriles but grew rapidly on amides and carboxylic acids, thus acting as a scavenger of products released by the actinobacterium. The soda soil consortium consisted of two Bacillus species (RNA group 1). One of them initiated nitrile hydrolysis, and the other utilized the hydrolysis products isobutyroamide (iBA) and isobutyrate (iB). In contrast to the actinobacterium, the nitrile-hydrolyzing soil Bacillus grew rapidly with hydrolysis products, but it was dependent on vitamins most probably supplied by its product-utilizing partner. All four bacterial strains isolated were moderately salt-tolerant alkaliphiles with a pH range for growth from pH 7.0 to 8.5 up to 10.3 to 10.5. However, both their nitrile hydratase and amidase activities had a near-neutral pH optimum, indicating an intracellular localization of these enzymes. Despite this fact, the study demonstrated a possibility of whole-cell biocatalytic hydrolysis of various nitriles at haloalkaline conditions.

APA, Harvard, Vancouver, ISO, and other styles

44

Aguiar, Maria Auxiliadora Mendes, Renata Monteiro Furtado, and Antônio Eduardo Clark Peres. "SELETIVIDADE NA FLOTAÇÃO CATIÔNICA REVERSA DE MINÉRIO DE FERRO." HOLOS 6 (December 5, 2017): 126. http://dx.doi.org/10.15628/holos.2017.6582.

Full text

Abstract:

A amina, quando adicionada em solução aquosa contendo quartzo, adsorve-se na interface sólido-líquido em determinado pH, tornando as partículas de quartzo hidrofóbicas. Tal hidrofobicidade pode ser afetada pela adição de amido, que é capaz de adsorver-se mutuamente com a amina, possivelmente devido à formação de um complexo helicoidal entre os reagentes, denominado de clatrato. Assim, o quartzo readquire caráter hidrofílico, por a amina ser mascarada pelo invólucro de amido. Foram realizados ensaios de microflotação e eletroforese. Nos ensaios de microflotação, foi estudada a flotabilidade da hematita e quartzo com os reagentes eteramina e os amidos maisena e amidex 4001. A maisena promoveu diminuição da flotabilidade do quartzo de 95% para 35% com aumento da dosagem de amina. O amidex não mostrou essa tendência nas condições estudadas. A depressão do quartzo foi favorecida pelo aumento nas dosagens tanto de maisena quanto de amina, e por condições básicas de pH. Os ensaios de eletroforese, para determinação do potencial zeta, foram realizados com amina e amina e maisena em concentrações de 80 mg/L, nas quais houve evidência da formação de clatratos. O potencial zeta apresentou valores menos negativos em pH superior a 7, quando comparado com o potencial zeta de quartzo condicionado apenas com amina. Por fim realizou-se ensaios com amina e amidex em concentrações de 80 mg/L, nas quais não foi observada variação significativa do potencial zeta quando comparado com potencial zeta de quartzo com amina nas mesmas condições.

APA, Harvard, Vancouver, ISO, and other styles

45

D’Abusco, Anna Scotto, Rita Casadio, Gianluca Tasco, Laura Giangiacomo, Anna Giartosio, Valentina Calamia, Stefania Di Marco, et al. "Oligomerization ofSulfolobus solfataricussignature amidase is promoted by acidic pH and high temperature." Archaea 1, no. 6 (2005): 411–23. http://dx.doi.org/10.1155/2005/543789.

Full text

Abstract:

The recombinant amidase from the hyperthermophylic archaeonSulfolobus solfataricus(SSAM) a signature amidase, was cloned, purified and characterized. The enzyme is active on a large number of aliphatic and aromatic amides over the temperature range 60–95 °C and at pH values between 4.0 and 9.5, with an optimum at pH 5.0. The recombinant enzyme is in the form of a dimer of about 110 kD that reversibly associates into an octamer in a pH-dependent reaction. The pH dependence of the state of association was studied using gel permeation chromatography, analytical ultracentrifugation and dynamic light scattering techniques.pH 7.0 all three techniques show the presence of two species, in about equal amounts, which is compatible with the existence of a dimeric and an octameric form. In decreasing pH, the dimers formed the octameric species and in increasing pH, the octameric species was converted to dimers. Above pH 8.0, only dimers were present, below pH 3.0 only octamers were present. The association of dimers into octamers decreased in non-polar solvents and increased with temperature. A mutant (Y41C) was obtained that did not show this behavior.

APA, Harvard, Vancouver, ISO, and other styles

46

Rifari Baron. "NILAI KECANTIKAN PEREMPUAN DALAM PUISI AMINAH KARYA WS RENDRA." Jurnal Metamorfosa 8, no. 1 (January 31, 2020): 37–51. http://dx.doi.org/10.46244/metamorfosa.v8i1.338.

Full text

Abstract:

This study aimed to examine and discover the value of beauty for women through a poem entitled Aminah by WS. Rendra. Beauty was an important phenomenon for every woman. However, how this woman's concept become a good value for herself. This study used qualitative research with content analysis methods. Data were collected using fragments of poetry. Data analysis consisted of data reduction, data presentation, conclusion / verification. The results showed that the figure of Aminah had a beauty which was admired by all men or everyone in her village. Aminah became a village flower, but her figure had became a proud and arrogant woman. In her findings, Aminah's beauty had no value that given a positive impact on herself or the community. Aminah became a miserable person because of the greed that came from her beauty. She became a woman who fell into the valley of black life as a Commercial Sex Worker. At the end of the poem story, Aminah was to return as the nature of women despite having to face scolding from the community. So, the value of women's beauty must be balanced between physical, psychological, and social. Abstrak Penelitian ini bertujuan untuk mengkaji dan menemukan nilai kecantikan bagi perempuan melalui puisi berjudul Aminah karya WS. Rendra. Kecantikan menjadi fenomena penting bagi setiap perempuan. Namun, bagaimana konsep perempuan ini menjadi nilai yang baik bagi diri perempuan itu sendiri. Penelitian ini menggunakan penelitian kualitatif dengan metode analisis isi. Data dikumpulkan menggunakan penggalan puisi. Analisis data terdiri dari reduksi data, penyajian data, penarikan kesimpulan/verifikasi. Hasil penelitian menunjukkan bahwa sosok Aminah memiliki kecantikan yang sangat dikagumi oleh semua laki-laki ataupun semua orang di desanya. Aminah menjadi bunga desa, namun sosoknya telah menjadi perempuan yang sombong dan angkuh. Dalam temuannya kecantikan Aminah tidak memiliki nilai yang berdampak positif terhadap dirinya ataupun masyarakat. Aminah malah menjadi orang yang sengsara karena keserakahannya yang berasal dari kecantikannya. Dia menjadi perempuan yang terjerumus pada lembah kehidupan hitam sebagai Pekerja Komersial Seks. Pada akhir cerita puisi, Aminah ingin kembali pada fitrah perempuan walaupun harus menghadapi cacian dari masyarakat. Jadi, nilai kecantikan perempuan harus seimbang antara fisik, psikis, dan sosial. Kata Kunci: Aminah, Nilai Kecantikan, Perempuan, Puisi

APA, Harvard, Vancouver, ISO, and other styles

47

Farida, Nilna Ulfatul, and Mochammad Firdaus. "DEVELOPING AN ANDROID APPLICATION ‘AMIYAH’ OF ARABIC CONVERSATION FOR HAJJ AND UMRAH WITH KODULAR." Arabi : Journal of Arabic Studies 7, no. 2 (December 21, 2022): 150–61. http://dx.doi.org/10.24865/ajas.v7i2.441.

Full text

Abstract:

The development of the 'Amiyah' application is based on real conditions in the Arabic class for Hajj. The lack of Amiyah Arabic learning resources makes Arabic Language Education students experience difficulties when learning it. Therefore, to overcome the anxiety regarding minimal learning resources, researchers developed an Android based 'Amiyah' application that all groups, especially students, can use. This method applies development research (RD) methods by adapting the Borg and Gall development model. The research instrument was an indirect closed questionnaire distributed via google form by personal chat. Samples were taken from as many as 30 students in the class. Quantitative and qualitative are used during data processing to provide easy to understand information. The results showed that the trial use of the 'Amiyah' application reached 85% with a very feasible interpretation. Thus, 'Amiyah' can be used as one of the learning media or learning media independently. ‘Amiyah’ is available at the following link https://tinyurl.com/amiyahapk.

APA, Harvard, Vancouver, ISO, and other styles

48

Lee, Kuan-Han, Yu-Sheng Lin, and Po-Jui Huang. "Design, Synthesis, and Characterization of Novel Thiol-Derivatized Ibuprofen Monolayer Protected Gold Clusters." Journal of Nanomaterials 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/931815.

Full text

Abstract:

A series of new thiol-derivatized ibuprofen monolayer protected gold clusters have been prepared by amidation of ibuprofen with alkyl alcohol or aminophenol affording the carboxamides, N-hydroxyalkyl amide2, and N-hydroxyphenyl amide6, which were then tosylated withp-toluenesulfonyl chloride at hydroxyl group to give3and7. Reactions of3and7with NaSH afforded the mercapto derivatives4and8. Conducting Brust’s reaction with a 3 : 1 mole ratio of thiolate ibuprofen/AuCl4-yielded polydisperse thiol-derivatized ibuprofen-MPCs5and9. All compounds have been identified by NMR, MS, UV, and IR spectroscopies. Compounds4and8and the MPCs5and9have been investigated by using the method of1H NMR spectroscopy. The broadening of the signals from 0.8 to 2.0 ppm in1H NMR spectrum of MPCs5and9confirmed the success of the conjugation of thiol-containing derivatives with nanogold cluster.

APA, Harvard, Vancouver, ISO, and other styles

49

Assénat, Martine, and Antoine Pérez. "Amida 1. Un théâtre à Amida." Anatolia Antiqua 20, no. 1 (2012): 147–55. http://dx.doi.org/10.3406/anata.2012.1328.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Assénat, Martine, and Antoine Pérez. "Amida 2. Un forum à Amida." Anatolia Antiqua 21, no. 1 (2013): 135–58. http://dx.doi.org/10.3406/anata.2013.1345.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Amidah'

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