Abstract In this paper, five degree based topological indices, the first Zagreb (M1), second Zagreb (M2), first multiple Zagreb (PM1), second multiple Zagreb (PM2), and the hyper Zagreb (HM) indices of two types of dendrimers are studied. In addition, two distance based topological indices, the total eccentricity (θ) and eccentric connectivity (ξc) indices of these dendrimers are computed.
{"title":"Study of Dendrimers by Topological Indices","authors":"N. Soleimani, S. B. Bahnamiri, M. Nikmehr","doi":"10.1515/achi-2017-0013","DOIUrl":"https://doi.org/10.1515/achi-2017-0013","url":null,"abstract":"Abstract In this paper, five degree based topological indices, the first Zagreb (M1), second Zagreb (M2), first multiple Zagreb (PM1), second multiple Zagreb (PM2), and the hyper Zagreb (HM) indices of two types of dendrimers are studied. In addition, two distance based topological indices, the total eccentricity (θ) and eccentric connectivity (ξc) indices of these dendrimers are computed.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81096549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Stefirta, V. Botnari, L. Brânză, I. Bulhac, E. Coropceanu, P. Bourosh, A. Chilinciuc
Abstract The effect of some selenium-containing compounds on the antioxidant properties of Allium sativum L. plants is shown in the present work. Pre-treatment of bulbs before planting and foliar treatment during plant growth with gibberellin solution (125 mg · L−1); potassium selenate (36 μg Se·L−1) and a new cobalt(III) coordinative compound (33 μg Se·L−1) resulted in the increase of the concentration of proline and assimilating pigments, reduced peroxide oxidation of lipids, enhanced antioxidant cell protection. The greatest effect was observed in plants pre-treated with the new coordinative compound, “Fludisec”, manifested by an increase of antioxidant properties of leaves and bulbs, optimization of growth process and productivity. X-ray analysis of monocrystal demonstrated that Fludisec is a coordination compound of ionic type tetrafluoroborate-[bis(dimethylglyoximato)-(selenocarbamide)1.4-(selenium-seleno-carbamide)0.5-(selenium-selenium)0.1cobalt(III)] with chemical formula [Co(DmgH)2(Seu)1,4(Se-Seu)0.5(Se-Se)0.1][BF4].
{"title":"Possibilities of Increasing the Antioxidant Properties of Garlic Plants (Allium sativum, L.)","authors":"A. Stefirta, V. Botnari, L. Brânză, I. Bulhac, E. Coropceanu, P. Bourosh, A. Chilinciuc","doi":"10.1515/achi-2017-0017","DOIUrl":"https://doi.org/10.1515/achi-2017-0017","url":null,"abstract":"Abstract The effect of some selenium-containing compounds on the antioxidant properties of Allium sativum L. plants is shown in the present work. Pre-treatment of bulbs before planting and foliar treatment during plant growth with gibberellin solution (125 mg · L−1); potassium selenate (36 μg Se·L−1) and a new cobalt(III) coordinative compound (33 μg Se·L−1) resulted in the increase of the concentration of proline and assimilating pigments, reduced peroxide oxidation of lipids, enhanced antioxidant cell protection. The greatest effect was observed in plants pre-treated with the new coordinative compound, “Fludisec”, manifested by an increase of antioxidant properties of leaves and bulbs, optimization of growth process and productivity. X-ray analysis of monocrystal demonstrated that Fludisec is a coordination compound of ionic type tetrafluoroborate-[bis(dimethylglyoximato)-(selenocarbamide)1.4-(selenium-seleno-carbamide)0.5-(selenium-selenium)0.1cobalt(III)] with chemical formula [Co(DmgH)2(Seu)1,4(Se-Seu)0.5(Se-Se)0.1][BF4].","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86630369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Mono and bis 4,5-dihydropyrano[3,2-c]chromene and 4,5- dihydropyrano[4,3-b]pyran derivatives were synthesized by three-component reaction of aromatic aldehydes, malononitrile and 4-hydroxycoumarin or 4- hydroxy-6-methylpyrone, in the presence of catalytic amounts of sodium benzenesulfinates, as a organocatalyst, in H2O/EtOH, at reflux. High conversions, short reaction times, cleaner reaction profiles and usage of a stable and also inexpensive catalyst are some of the advantages of this method.
{"title":"Three-Component Synthesis of Mono and Bis 4,5-Dihydropyrano[3,2-C]Chromenes and 4,5- Dihydropyran[4,3-B]Pyrans Catalyzed by Sodium Benzenesulfinates as a Green Organocatalyst","authors":"M. Abaszadeh, M. Seifi","doi":"10.1515/achi-2017-0005","DOIUrl":"https://doi.org/10.1515/achi-2017-0005","url":null,"abstract":"Abstract Mono and bis 4,5-dihydropyrano[3,2-c]chromene and 4,5- dihydropyrano[4,3-b]pyran derivatives were synthesized by three-component reaction of aromatic aldehydes, malononitrile and 4-hydroxycoumarin or 4- hydroxy-6-methylpyrone, in the presence of catalytic amounts of sodium benzenesulfinates, as a organocatalyst, in H2O/EtOH, at reflux. High conversions, short reaction times, cleaner reaction profiles and usage of a stable and also inexpensive catalyst are some of the advantages of this method.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89444580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract We report the mass spectrometric analysis of zeins extracted from degreased maize flour with either an aqueous 70% ethanol solution or 60% acetonitrile containing 10 mM dithiothreitol. The analysis was performed on a MALDI-TOF mass spectrometer using α-cyano-4-hydroxycinnamic acid as matrix. The method allowed the detection of α-, β- and γ-zeins, but not δ-zeins and was used for the analysis of zein content in the maize inbred KWS 3381 and in commercial flour at different flour particles sizes: between 710 μm and 1.0 mm, between 250 μm and 355 μm and smaller than 100 μm.
{"title":"MALDI-TOF Mass Spectrometric Analysis of Zeins Extracted from Maize Seeds","authors":"R. Ştefănescu, S. Băncilă","doi":"10.1515/achi-2017-0008","DOIUrl":"https://doi.org/10.1515/achi-2017-0008","url":null,"abstract":"Abstract We report the mass spectrometric analysis of zeins extracted from degreased maize flour with either an aqueous 70% ethanol solution or 60% acetonitrile containing 10 mM dithiothreitol. The analysis was performed on a MALDI-TOF mass spectrometer using α-cyano-4-hydroxycinnamic acid as matrix. The method allowed the detection of α-, β- and γ-zeins, but not δ-zeins and was used for the analysis of zein content in the maize inbred KWS 3381 and in commercial flour at different flour particles sizes: between 710 μm and 1.0 mm, between 250 μm and 355 μm and smaller than 100 μm.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82851057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fatemeh Noori Sadeh, Maryam Fatahpour, N. Hazeri, M. Maghsoodlou, M. Lashkari
Abstract The synthesis of some biologically important xanthenes, by efficient and convenient approach for one-pot condensation reaction of aldehydes and dimedone or β-naphthol in the presence of lactic acid as an efficient, inexpensive and environmental friendliness catalyst under solvent-free conditions, is presented. The merits of this reaction are higher product yields in shorter reaction time and environmentally benign reaction conditions.
{"title":"One-Pot Condensation Approach for the Synthesis of Some 1,8-Dioxo-octahydroxanthenes and 14-Aryl-14H-dibenzo[a,j]Xanthenes Using Lactic Acid as an Efficient and Eco-Friendly Catalyst","authors":"Fatemeh Noori Sadeh, Maryam Fatahpour, N. Hazeri, M. Maghsoodlou, M. Lashkari","doi":"10.1515/achi-2017-0004","DOIUrl":"https://doi.org/10.1515/achi-2017-0004","url":null,"abstract":"Abstract The synthesis of some biologically important xanthenes, by efficient and convenient approach for one-pot condensation reaction of aldehydes and dimedone or β-naphthol in the presence of lactic acid as an efficient, inexpensive and environmental friendliness catalyst under solvent-free conditions, is presented. The merits of this reaction are higher product yields in shorter reaction time and environmentally benign reaction conditions.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81402607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract A complex of manganese (III) and R,R-1,2-Diaminocyclohexane linked ketopinic acid ligand was synthesized and utilised as catalyst in the aldol condensation reactions of benzaldehyde with various aliphatic ketones to furnish products with excellent yield of > 99%.
{"title":"Aldol Condensation Reactions Effectively Catalysed by Lewis Acid","authors":"Yusuf Hassan, Rosalyn Klein, P. Kaye","doi":"10.1515/achi-2017-0007","DOIUrl":"https://doi.org/10.1515/achi-2017-0007","url":null,"abstract":"Abstract A complex of manganese (III) and R,R-1,2-Diaminocyclohexane linked ketopinic acid ligand was synthesized and utilised as catalyst in the aldol condensation reactions of benzaldehyde with various aliphatic ketones to furnish products with excellent yield of > 99%.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84794896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract This brief review takes a look at flavonoids, a wide class of polyphenols, which are regarded as plant secondary metabolites. Their roles in plants are diverse and little understood. They can act as growth hormone modulators, phytoalexins, they offer UV protection, contribute to pollen viability and can function as signaling molecules in establishing symbiotic relationships. Flavonoids were also found to have a range of beneficial effects for the human body. Their anticancer, antioxidant, anti-inflammatory and cardioprotective activity, as well as their antibacterial, antiviral and antihelmintic properties make them promising candidates for the design of new drugs.
{"title":"Flavonoids – Small Molecules, High Hopes","authors":"M. Sandu, L. Birsa, L. Bahrin","doi":"10.1515/achi-2017-0003","DOIUrl":"https://doi.org/10.1515/achi-2017-0003","url":null,"abstract":"Abstract This brief review takes a look at flavonoids, a wide class of polyphenols, which are regarded as plant secondary metabolites. Their roles in plants are diverse and little understood. They can act as growth hormone modulators, phytoalexins, they offer UV protection, contribute to pollen viability and can function as signaling molecules in establishing symbiotic relationships. Flavonoids were also found to have a range of beneficial effects for the human body. Their anticancer, antioxidant, anti-inflammatory and cardioprotective activity, as well as their antibacterial, antiviral and antihelmintic properties make them promising candidates for the design of new drugs.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85587615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"In Memoriam Professor Dr. Engineer Gheorghe Mihăilă (1939 – 2017)","authors":"D. Lutic","doi":"10.1515/ACHI-2017-0002","DOIUrl":"https://doi.org/10.1515/ACHI-2017-0002","url":null,"abstract":"","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75116789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract KF/Al2O3 as a green and efficient catalyst has been used for synthesis of indolizine-1-carbonitrile derivatives. It can be proceeded by using 1,3-dipolar cycloaddition reaction of 1-alkyl-2-chloropyridinium bromides, malononitrile and benzaldehyde in ethanol, at reflux. The great advantage of this catalyst is the ease of handling. KF/Al2O3 can be used and removed by filtration, avoiding cumbersome aqueous workups and decreasing solvent waste handling issues. High conversions, short reaction times and a cleaner reaction profiles are some of the outstanding advantages of this method.
{"title":"KF/Al2O3 as a Recyclable Basic Catalyst for 1,3-Dipolar Cycloaddition Reaction: Synthesis of Indolizine-1-Carbonitrile Derivatives","authors":"M. Abaszadeh, M. Seifi","doi":"10.1515/achi-2017-0006","DOIUrl":"https://doi.org/10.1515/achi-2017-0006","url":null,"abstract":"Abstract KF/Al2O3 as a green and efficient catalyst has been used for synthesis of indolizine-1-carbonitrile derivatives. It can be proceeded by using 1,3-dipolar cycloaddition reaction of 1-alkyl-2-chloropyridinium bromides, malononitrile and benzaldehyde in ethanol, at reflux. The great advantage of this catalyst is the ease of handling. KF/Al2O3 can be used and removed by filtration, avoiding cumbersome aqueous workups and decreasing solvent waste handling issues. High conversions, short reaction times and a cleaner reaction profiles are some of the outstanding advantages of this method.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83280661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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