the Chemical Technology最新文献_第7页

Synthesis of new thiosulfonate derivatives with quinone and quinoxaline fragments 用醌和喹啉片段合成新的硫代磺酸衍生物

the Chemical Technology Pub Date : 2014-02-05 DOI: 10.5755/J01.CT.64.2.6019

K. Bolibrukh, N. Monka, Svyatoslav Polovkovych, V. Lubenets, V. Novikov, O. Khoumeri, T. Terme, P. Vanelle, O. Solovyov

引用次数: 1

EVALUATION OF SECONDARY METABOLITES’ VARIATION IN MEDICINAL PLANTS AND OPTIMIZATION OF SAGE (SALVIA OFFICINALIS L.) GROWTH IN VITRO 药用植物次生代谢物的变异评价及鼠尾草的优化体外生长

the Chemical Technology Pub Date : 2014-02-05 DOI: 10.5755/J01.CT.64.2.6021

A. Ramanauskas, I. Jonuškienė

{"title":"EVALUATION OF SECONDARY METABOLITES’ VARIATION IN MEDICINAL PLANTS AND OPTIMIZATION OF SAGE (SALVIA OFFICINALIS L.) GROWTH IN VITRO","authors":"A. Ramanauskas, I. Jonuškienė","doi":"10.5755/J01.CT.64.2.6021","DOIUrl":"https://doi.org/10.5755/J01.CT.64.2.6021","url":null,"abstract":"Plants produce a wide variety of secondary metabolites that have been selected during evolution as defense substances against herbivores, predators or infective microbes and viruses, or as signal compounds. These secondary compounds have attracted great interest for drug development as they may represent lead structures for new or already existing drug targets. The goals of the research: 1) to explore metabolites (total phenolic compounds, flavonoids, vitamin C) and the antioxidant activity of medicinal plants in vivo ; 2) to select medicinal plants which have accumulated the highest content of secondary metabolites; 3) to prepare the culture media with different pH values for the sage in vitro ; 4) to prepare the culture media with different KH 2 PO 4 quantities for the sage ( Salvia officinalis L.) in vitro ; 5) to explore secondary metabolites (total phenolic compounds, vitamin C, tannins) of the sage in vitro ; 6) to compare the content of metabolites of sage plants in vivo and in vitro ; In conclusion, in order to grow sage ( Salvia officinalis L.) which would give a large biomass and produce large quantities of metabolites, it is useful to increase the amount of KH 2 PO 4 two times in the Murashige–Skoog (MS) nutrient medium and to maintain pH within 5.7–6.7. Sage ( Salvia officinalis L.) was found to accumulate the larger amount of metabolites in vitro , i.e. 1.7 times of tannins, 3.8 times of the vitamin C, and 3 times of flavonoids in comparison with the sage in vivo. DOI: http://dx.doi.org/10.5755/j01.ct.64.2.6021","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"44 1","pages":"28-34"},"PeriodicalIF":0.0,"publicationDate":"2014-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74952535","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

INFLUENCE OF POTASSIUM RAW MATERIALS ON THE BULK FERTILIZER MAKING PROCESS AND ON THE PRODUCT PROPERTIES 钾原料对散肥生产过程及产品性能的影响

the Chemical Technology Pub Date : 2014-02-01 DOI: 10.5755/J01.CT.64.2.6099

R. Šlinkšienė, O. Brigaityte

{"title":"INFLUENCE OF POTASSIUM RAW MATERIALS ON THE BULK FERTILIZER MAKING PROCESS AND ON THE PRODUCT PROPERTIES","authors":"R. Šlinkšienė, O. Brigaityte","doi":"10.5755/J01.CT.64.2.6099","DOIUrl":"https://doi.org/10.5755/J01.CT.64.2.6099","url":null,"abstract":"In this work, different sources of potassium materials were used for 10-20-20 + S + Mg fertilizer granulation. It was found that both the raw material KCl and magnesium from carnallite production by-products (KE) can be used for fertilizer making. With both potassium raw materials, upon selecting certain granulation process parameters, it is possible to make a high-quality product. To produce a high quality 10-20-20 + S + Mg NPK fertilizer which would be a marketable fraction, using KE requires less moisture than granulation using KCl. If the water content with KCl is 10.1 %, with a sufficient KE it is 8.8 %. However, the drying of fertilizers requires higher energy costs, as maintaining the same drying temperature and the same drying time, the fertilizer produced with KE, the remaining moisture content is 1–3 %, and this is a too high moisture for a fertilizer. The marketable fraction produced using KE is less dependent on raw material mixture granulometric composition than with KCl. The origin potassium raw materials has no significant influence on the static strength of granules. DOI: http://dx.doi.org/10.5755/j01.ct.64.2.6099","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"62 1","pages":"63-71"},"PeriodicalIF":0.0,"publicationDate":"2014-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74409461","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

COMPOUND FORMATION AT 175 °C IN CALCIUM HYDROXIDE AND SILICA DIOXIDE SUSPENSION 在175°c氢氧化钙和二氧化硅悬浮液中形成化合物

the Chemical Technology Pub Date : 2014-02-01 DOI: 10.5755/J01.CT.64.2.6100

T. Dambrauskas, K. Baltakys

{"title":"COMPOUND FORMATION AT 175 °C IN CALCIUM HYDROXIDE AND SILICA DIOXIDE SUSPENSION","authors":"T. Dambrauskas, K. Baltakys","doi":"10.5755/J01.CT.64.2.6100","DOIUrl":"https://doi.org/10.5755/J01.CT.64.2.6100","url":null,"abstract":"Compound formation peculiarities in the Ca(OH) 2 –SiO 2 ∙nH 2 O–H 2 O system with the molar ratio of CaO/SiO 2 equal to 1.5 have been examined. The hydrothermal synthesis of the compounds has been carried out in unmixed suspensions at a temperature of 175 °C. The duration of isothermal curing was 4, 8, 16, 24, 48, and 72 hours. In unstirred Ca(OH) 2 and SiO 2 ∙nH 2 O suspensions with CaO/SiO 2 = 1.5, within 4 hours of isothermal curing at 175 °C, dicalcium silicate hydrates – a-C 2 S hydrate, C-S-H(II) and a low base semi-crystalline C-S-H(I) type calcium silicate hydrate – were formed. Within 48 h of hydrothermal synthesis, Ca(OH) 2 was fully reacted, and semi-crystalline C-S-H(II) became metastable and recrystallized into stable compounds – a-C 2 S hydrate and C-S-H(I). The typical destruction temperatures of a-C 2 S hydrate and Ca(OH) 2 were possible to determine by using differential thermogravimetric analysis data: the destruction of Ca(OH) 2 intensively proceeded at a temperature of ~456 oC when a sample lost 1.85 % of its mass. Meanwhile, a-C 2 S hydrate destruction occurred at a higher temperature (~478 oC), and weight loss was equal to 0.58 %. After 72 h of synthesis, a-C 2 S hydrate prevailed in the products. DOI: http://dx.doi.org/10.5755/j01.ct.64.2.6100","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"11 1","pages":"45-50"},"PeriodicalIF":0.0,"publicationDate":"2014-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84943592","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

Regularities of photoelectrochemical oxidation of glycerol using electrophoretically deposited TiO2 coatings on steel 电泳沉积TiO2涂层在钢表面光电氧化甘油的规律

the Chemical Technology Pub Date : 2013-07-01 DOI: 10.5755/J01.CT.62.4.3228

R. Mardosaitė, E. Valatka

引用次数: 0

Sugar factory lime usage for the production of feed phosphates 糖厂石灰用于生产饲料磷酸盐

the Chemical Technology Pub Date : 2013-07-01 DOI: 10.5755/J01.CT.62.4.3227

R. Šlinkšienė, R. Paleckienė, A. Sviklas

{"title":"Sugar factory lime usage for the production of feed phosphates","authors":"R. Šlinkšienė, R. Paleckienė, A. Sviklas","doi":"10.5755/J01.CT.62.4.3227","DOIUrl":"https://doi.org/10.5755/J01.CT.62.4.3227","url":null,"abstract":"Pastaraisiais metais ES (po kempinligės protrūkio 2008 m.) apribojus gyvūninės kilmės liekanų perdirbimą ir naudojimą gyvūnų mitybos poreikiams tenkinti, daugiau dėmesio skiriama galimybėms pasarinius priedus gaminti is mineralinės kilmės žaliavų. Siuo tikslu placiai naudojami įvairūs gamtiniai fosfatai, kuriuose yra gyvuliams reikalingų kalcio ir fosforo, taciau dažnai pasitaiko ir žalingų bei griežtai reglamentuojamų priemaisų: kadmio, svino ar fluoro. Alternatyvi žaliava fosforitams galėtų būti cukraus pramonės atlieka – defekatas, kurio didžiąją dalį sudaro kalcio karbonatas. Siame darbe tirtos galimybės defekatą panaudoti pasariniams fosfatams (precipitatui) gaminti apdorojant jį fosforo rūgstimi. Nustatyta, kad, keiciant defekato ir rūgsties santykį, 40 °C temperatūroje defekatą 15 min skaidant 30–40 % koncentracijos H 3 PO 4 , galima gauti įvairios sudėties kalcio fosfatų misinius. Atsižvelgiant į pasirinktas skaidymo sąlygas, pasariniuose fosfatuose keiciasi vandenyje tirpaus kalcio hidrofosfato ir citrate tirpaus kalcio dihidrofosfato kiekiai. Be to, defekate nėra žalingų sunkiųjų metalų priemaisų, todėl si žaliava gali būti naudojama gyvulių pasarų priedams gaminti. DOI: http://dx.doi.org/10.5755/j01.ct.62.4.3227","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"5 1","pages":"16-21"},"PeriodicalIF":0.0,"publicationDate":"2013-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90401277","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

The influence of sodium hydroxide on the rheological properties of pastes and gels of potato, corn and wheat starches 氢氧化钠对马铃薯、玉米和小麦淀粉糊状和凝胶流变学特性的影响

the Chemical Technology Pub Date : 2013-07-01 DOI: 10.5755/J01.CT.62.4.3229

J. Galkin, A. Galkina, J. Liesienė, E. Mazoniene

引用次数: 0

Akademiko Jono Janickio chemijos konkursas moksleiviams

the Chemical Technology Pub Date : 2013-06-13 DOI: 10.5755/J01.CT.63.1.4607

Nerijus Turskis

引用次数: 0

Prisimenant docentą Julių Mituzą

the Chemical Technology Pub Date : 2013-06-13 DOI: 10.5755/J01.CT.63.1.4605

Nerijus Turskis

引用次数: 0

Changes of phenolic content and antiradical activity in hybrids of Nante carrots during storage 南特胡萝卜杂交品种贮藏期间酚类物质含量及抗自由基活性的变化

the Chemical Technology Pub Date : 2013-03-08 DOI: 10.5755/J01.CT.62.4.3119

I. Augšpole, T. Rakčejeva, L. Dukaļska

{"title":"Changes of phenolic content and antiradical activity in hybrids of Nante carrots during storage","authors":"I. Augšpole, T. Rakčejeva, L. Dukaļska","doi":"10.5755/J01.CT.62.4.3119","DOIUrl":"https://doi.org/10.5755/J01.CT.62.4.3119","url":null,"abstract":"Carrots are one of the most consumed plant foods in the world in all seasons; they are good sources of natural antioxidants and contain many different antioxidant components. Carrots are recommended for healthy diets as recognized sources of dietary fiber and antioxidant substances, such as phenols. The current research focuses on the evaluation total phenolic and antiradical activity changes in hybrids of Nantes carrots during storage. Late-bearing variety Nantes hybrid carrots were used for experiments such as Nantes/Berlikum, Nantes/Maestro, Nantes/Forto, Nantes/Bolero and Nantes/Champion. Changes of the quality parameters were evaluated after two and four months of storage in the comparison with non-stored carrots. Standard methods were used to evaluate the quality parameters: total phenols were analysed by the Folin – Ciocalteu colorimetric method with some modifications, and the antiradical activity was measured by the DPPH radical method. The present experiments revealed significant differences ( p < 0.05) in the content of total phenols and antiradical activity changes during carrot storage. The results of the research demonstrate that the content of total phenols decreases within four months of storage approximately 1.3 times as compared with the initial content before storage. However, changes of antiradical activity in carrots after two months of storage were not significant. The a ntiradical activity of carrots decreased significantly (1.8 times on average) after four months of storage. DOI: http://dx.doi.org/10.5755/j01.ct.62.4.3119","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"54 1","pages":"36-39"},"PeriodicalIF":0.0,"publicationDate":"2013-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79700947","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: 6