Acta Chemica Iasi最新文献_第3页

ANTIOXIDANT ACTIVITY OF PHENOLIC COMPOUNDS IN Dioscorea alata L. (RAJA ALA) TUBER COOKING WATER 薯蓣块茎蒸煮水中酚类化合物的抗氧化活性

IF 0.5

Acta Chemica Iasi Pub Date : 2021-01-01 DOI: 10.47743/achi-2021-2-0013

Ruwanthi Amarasekara, S. Wickramarachchi

{"title":"ANTIOXIDANT ACTIVITY OF PHENOLIC COMPOUNDS IN Dioscorea alata L. (RAJA ALA) TUBER COOKING WATER","authors":"Ruwanthi Amarasekara, S. Wickramarachchi","doi":"10.47743/achi-2021-2-0013","DOIUrl":"https://doi.org/10.47743/achi-2021-2-0013","url":null,"abstract":"Nutritional compounds in yams may leach out to the cooking water under most traditional domestic cooking methods. Finding alternative uses of these waste waters without discarding, can maximize the usage and importance of these yams. This study aimed to quantify the bioactive compounds and determine the antioxidant activity in the cooking water collected after boiling of Dioscorea alata L. tubers under two domestic cooking methods. Raja ala yams were boiled in water using conventional boiling (CB) and pressure cooking (PC) methods. The cooking water of both methods were collected and concentrated to obtain the solid crude product. Aqueous solutions of the crude product of CB and PC samples were prepared and subjected to qualitative phytochemical analysis. Further, they were assayed for total phenolic content (TPC), total flavonoid content (TFC), and total anthocyanin content (TAC). Antioxidant activity of each crude product was determined and a correlation between the antioxidant activity and TPC, TFC and TAC of the samples was developed using the Pearson’s correlation method. Phytochemical screening of CB and PC samples showed the presence of alkaloids, flavonoids, phenols, saponin, tannins and coumarins and an absence of proteins. CB showed a significantly higher TPC than that of PC whereas the TFC of PC was higher than CB. Both methods however, showed no significant difference in TAC extraction. Antioxidant assays showed higher activity in CB over the PC sample. A strong correlation was observed between TPC versus DPPH activity (IC50 value) and TAA of the samples. It can thus be concluded that the wastewater of both cooking methods contain a significant amount of bioactive compounds, making it a nutritious source to be further investigated and to be made use for alternate purposes without discarding it.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":"41 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72853775","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}

引用次数: 1

VARIATION IN DIELECTRIC PROPERTIES OF COMPOSITE CERAMICS: LITHIUM FERRITE SUBSTITUTED BARIUM TITANATE 复合陶瓷介电性能的变化:铁酸锂取代钛酸钡

IF 0.5

Acta Chemica Iasi Pub Date : 2021-01-01 DOI: 10.47743/achi-2021-2-0007

Hanumantha Rao Daruvuru, Ganapathi Rao Gajula, A. Chintabathini, M. Dasari

引用次数: 0

ION EXCHANGE MONOLITHIC COLUMN FOR COPPER DETERMINATION 离子交换整体柱测定铜

IF 0.5

Acta Chemica Iasi Pub Date : 2021-01-01 DOI: 10.47743/achi-2021-2-0011

Ehab Fadhel Abed, A. A. Alkarimi

{"title":"ION EXCHANGE MONOLITHIC COLUMN FOR COPPER DETERMINATION","authors":"Ehab Fadhel Abed, A. A. Alkarimi","doi":"10.47743/achi-2021-2-0011","DOIUrl":"https://doi.org/10.47743/achi-2021-2-0011","url":null,"abstract":"Glycidyl methacrylate‐co-ethylene dimethcrylate-coacryl amide monolithic column was synthesized as a strong cation exchange column. A borosilicate tube (60 mm in length) with 1.5 mm and 3.0 mm (i.d and o.d respectively) was used for in-situ copolymerization using U.V light source. Monomers (glycidyle metharcrylate and acrylamide) and crosslinker ethylene dimethacrylate were dissolved in a porogenic solvent consisting of 1-propanol and 2-butanol. The polymer was formed after 4 min. After that, the epoxy groups in glycidyle methacrylate were opened to form a cation exchange monolithic column by pumping 0.2 M HCl. The monolith was characterized using diverse techniques such as FT-IR, BET, and FE-SEM. From FT-IR spectrum it can be noticed that the peak of (C=C) in the monomers and crosslinker are disappeared which is consider a significant indicator for polymer formation. The BET technique was used to investigate the pore size and surface area of the monolith, the result showed that the average pores size was 5.1859 nm and the surface area was 16.021 m/g. The FE-SEM technique was used to study the monolith morphology and the type of pore and the result proved that the monolith has a network of enormous channels and macroporse. The Prepared monolith in this study was used to remove copper ions and determine these ions using ion-exchange techniques.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":"16 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82666532","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}

引用次数: 1

CLEANING OF BEYŞEHİR (BAYAVŞAR) COAL IN TURKEY WITH HYDROPHOBIC FLOCCULATION USING WASTE MOTOR OIL 用废机油疏水絮凝法清洗土耳其beyŞehİr (bayavŞar)煤

IF 0.5

Acta Chemica Iasi Pub Date : 2021-01-01 DOI: 10.47743/ACHI-2021-1-0005

T. Agacayak, Osman Agca

{"title":"CLEANING OF BEYŞEHİR (BAYAVŞAR) COAL IN TURKEY WITH HYDROPHOBIC FLOCCULATION USING WASTE MOTOR OIL","authors":"T. Agacayak, Osman Agca","doi":"10.47743/ACHI-2021-1-0005","DOIUrl":"https://doi.org/10.47743/ACHI-2021-1-0005","url":null,"abstract":"In this study, the hydrophobic flocculation behavior of lignite coal obtained from Beyşehir region in Turkey and the effect of some parameters were investigated. These parameters were selected as pH, amount of dispersant, amount of binding liquid, flock growth time, stirring speed, flocculation time and solid ratio. The ash content (ash, %) and combustible recovery (CR, %) of the flocks obtained as a result of the experiments were determined. As a result of the studies, the optimum pH value (3), amount of sodium silicate (1 mL), amount of waste motor oil (3 mL), flock growth time (1 min), stirring speed (1250 rpm), flocculation time (2 min) and solid ratio (5 g) were determined. The hydrophobicity of fine coal grains was increased by using waste motor oil. According to the hydrophobic flocculation results of coal grains, flocks with 17.03% ash content and 99.06% combustion recovery were obtained. While the contact angle of the original coal was 44°, it was observed that the contact angle of the obtained flocks reached 117°. It was determined from experiments that the surfaces of the coal grains have a very high hydrophobicity. As a result, clean coal with a reduced ash content of 53.22% was obtained.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":"24 1","pages":"65-80"},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73401220","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}

引用次数: 0

NOVEL SYNTHESIS OF [1,2,4]-TRIAZOLO-QUINAZOLINONE AND PYRIMIDINE DERIVATIVES MEDIATED BY CERIC AMMONIUM NITRATE (CAN) 硝酸铈铵介导[1,2,4]-三唑-喹唑啉酮及其嘧啶衍生物的新合成

IF 0.5

Acta Chemica Iasi Pub Date : 2021-01-01 DOI: 10.47743/ACHI-2021-1-0002

K. Shaikh, Uddhav N. Chaudhar

引用次数: 3

EMULSIFYING ABILITY OF BIOCOMPOSITION BASED ON HUMIC SUBSTANCES AND MICROORGANISMS OF THE GENUS RHODOCOCCUS IN THE RELATION TO OIL 以腐殖质和红球菌属微生物为基础的生物组成物乳化能力与油脂的关系

IF 0.5

Acta Chemica Iasi Pub Date : 2020-01-01 DOI: 10.2478/achi-2020-0008

M. M. Gertsen, E. Dmitrieva

引用次数: 1

SIMULTANEOUS VOLTAMMETRIC DETERMINATION OF p-AMINOPHENOL AND PARACETAMOL USING ACTIVATED GLASSY CARBON ELECTRODE: CYCLIC VOLTAMMETRY AND DIFFERENTIAL PULSE VOLTAMMETRY STUDY 用活性碳电极伏安法同时测定对氨基酚和扑热息痛:循环伏安法和差分脉冲伏安法的研究