the Chemical Technology最新文献_第9页

The influence of N-substituted β-alanines containing naphthoquinone and thiazole moieties on the growth of St. John’s Wort (Hypericum Perforatum L.) and its ability to accumulate metabolites 含萘醌和噻唑基团的n -取代β-丙氨酸对圣约翰草生长及代谢物积累能力的影响

the Chemical Technology Pub Date : 2013-01-30 DOI: 10.5755/J01.CT.62.4.3409

V. Blėkaitytė, I. Jonuškienė, V. Mickevičius

{"title":"The influence of N-substituted β-alanines containing naphthoquinone and thiazole moieties on the growth of St. John’s Wort (Hypericum Perforatum L.) and its ability to accumulate metabolites","authors":"V. Blėkaitytė, I. Jonuškienė, V. Mickevičius","doi":"10.5755/J01.CT.62.4.3409","DOIUrl":"https://doi.org/10.5755/J01.CT.62.4.3409","url":null,"abstract":"In recent years, the growing interest in medicinal plants and their products led the producers of pharmaceuticals to start utilizing the biomass of cultivated plants instead of collecting the biomass that naturally appears in nature. Most of these plants are grown organically; therefore, they are highly exposed to the pathogens that lower the yield of medicinal plants and modify the chemical composition of the plant extracts. The aim of this work was to evaluate and compare the effect of N -substituted β -alanine derivatives containing 1,4-naphthoquinone and thiazole fragments on the growth of St. John’s wort and its ability to accumulate valuable metabolites. Five β -alanine compounds were used during this research, and three well known compounds (3-indolylacetic acid, 2-methyl-1,4-naphthoquinone, N -phenyl -N -tiocarbamoyl- β -a lanine) were chosen for comparison. The shoots of medicinal plants were evaluated for their growth after treatment with different concentrations (0.25–5 mg/l) of β -alanine derivatives. The highest growth-regulating effect on Hypericum perforatum L. was shown by N -(1,4-naphthoquinon-2-yl)- β -alanine ( 1 ) (1 mg/l) and N -phenyl- N -[(5-(phenyl)methylidene)-4-oxo-2(4H)-thiazolyl]- β -alanine ( 5 ) (1 mg/l); therefore, they were chosen for the further research. The shoots of St. John’s wort were grown on the Murashige & Skoog (MS) medium supplemented with compounds 1 and 5 . The highest amount of pigments (carotenoids, chlorophylls a and b ) after a short period of cultivation was obtained in the leaves of shoots grown on the MS + 1 (1 mg/l) medium; however, treatment with compound 5 increased the content of pigments after a long period (8–9 weeks) of cultivation. According to the results, the highest content of phenolics was found in shoots grown on a medium supplemented with compound 5 . DOI: http://dx.doi.org/10.5755/j01.ct.62.4.3409","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"1 1","pages":"29-35"},"PeriodicalIF":0.0,"publicationDate":"2013-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89841905","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

Correlations between meat quality traits and cholesterol content in M. longissimus dorsi in pigs of different genotypes 不同基因型猪背最长分枝杆菌肉质性状与胆固醇含量的相关性

the Chemical Technology Pub Date : 2013-01-30 DOI: 10.5755/J01.CT.62.4.3408

E. Meškinytė-Kaušilienė, V. Jukna, J. Klementavičiūtė

引用次数: 0

Evaluation of pumpkin-rowanberry marmalade quality after different drying times 不同干燥时间后南瓜罗文果果酱品质的评价

the Chemical Technology Pub Date : 2013-01-30 DOI: 10.5755/J01.CT.62.4.3412

E. Berņa, S. Kampuse, M. Sabovics, E. Straumite

{"title":"Evaluation of pumpkin-rowanberry marmalade quality after different drying times","authors":"E. Berņa, S. Kampuse, M. Sabovics, E. Straumite","doi":"10.5755/J01.CT.62.4.3412","DOIUrl":"https://doi.org/10.5755/J01.CT.62.4.3412","url":null,"abstract":"Historically, marmalades may have originated as an early effort to preserve fruit for consumption in the off-season. Marmalades are basically products with fruit puree and sugar–acid–pectin gel. The aim of the current research was to determine the chemical and physical properties and to investigate the degree of acceptance of pumpkin – rowanberry marmalade. The experiments were carried out at the Faculty of Food Technology of the Latvia University of Agriculture. The marmalade was made from Cucurbita maxima pumpkin and sweet rowanberry Sorbus aucuparia cultivar ‘Nevezhinskaya’ pur e es. D ifferent drying times in oven at a temperature of 50 ± 2 °C were examined and compared with marmalade drying in air ambiance at room temperature. The moisture, total carotene, ascorbic acid content, hardness, colour, and the degree of acceptance of marmalade samples were determined as quality evaluation. The results of the research have shown a large variability in the physical and chemical parameters among the marmalades after different drying times. The moisture content of marmalade samples decreased by 9.1 to 33.5 %, and hardness increased from 1.85 to 9.54 N. According to sensory evaluation, consumers liked pumpkin–rowanberry marmalade samples after drying in the air ambiance at room temperature. DOI: http://dx.doi.org/10.5755/j01.ct.62.4.3412","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"100 1","pages":"61-66"},"PeriodicalIF":0.0,"publicationDate":"2013-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88988093","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: 3

Mechanical properties of Mn coatings, electrodeposited from sulphate electrolyte with Te(VI) additive at different temperatures 添加Te(VI)的硫酸盐电解质在不同温度下电沉积Mn涂层的力学性能

the Chemical Technology Pub Date : 2013-01-16 DOI: 10.5755/J01.CT.62.4.3317

A. Sulcius, N. Žmuidzinavičienė, E. Griškonis, A. Jezerskaitė

引用次数: 0

Functional properties of powdered β-lactoglobulin – cholecalciferol complexes 粉末状β-乳球蛋白-胆骨化醇复合物的功能特性

the Chemical Technology Pub Date : 2013-01-16 DOI: 10.5755/J01.CT.62.4.3318

K. Szulc, A. Górska

引用次数: 0

Septintoji Baltijos valstybių maisto mokslo ir technologijos konferencija FOODBALT 2012

the Chemical Technology Pub Date : 2012-11-29 DOI: 10.5755/J01.CT.61.3.2951

Nerijus Turskis

引用次数: 0

Synthesis, computational and antimicrobial studies of new 1,4-naphthoquinone aminothiazole derivatives 新型1,4-萘醌氨基噻唑衍生物的合成、计算及抗菌研究

the Chemical Technology Pub Date : 2012-11-13 DOI: 10.5755/J01.CT.61.3.2847

I. Buchkevych, M. Stasevych, V. Chervetsova, R. Musyanovych, V. Novikov, V. Poroikov, T. Gloriozova, D. Filimonov, G. Zagoriy, M. Ponomarenko

{"title":"Synthesis, computational and antimicrobial studies of new 1,4-naphthoquinone aminothiazole derivatives","authors":"I. Buchkevych, M. Stasevych, V. Chervetsova, R. Musyanovych, V. Novikov, V. Poroikov, T. Gloriozova, D. Filimonov, G. Zagoriy, M. Ponomarenko","doi":"10.5755/J01.CT.61.3.2847","DOIUrl":"https://doi.org/10.5755/J01.CT.61.3.2847","url":null,"abstract":"Synthesis of new aminothiazole derivatives on the basis of substituted 1,4-naphthoquinones was carried out by interaction of 2-R-3,6-dichloro-7-acylamino-1,4-naphthoquinones and potassium thiocyanate, 3,6-dichloro-2,7-diacylamino-1,4-naphthoquinone and dithiocyanate, interaction of 2-R-3,6-dichloro-7-amino-1,4-naphthoquinones, 2-amino-7-nitro-3,6-dichloro-1,4-naphthoquinone and thiourea with the subsequent cyclization in aminothiazoles of 1,4-naphthoquinone. Physical and chemical properties of these compounds were determined, and the methods of their preparation are presented. Computer program PASS was used for prediction of biological activity spectra of new 1,4-naphthoquinone aminothiazole derivatives, to determine the most promising biological activities for experimental testing. Antibacterial and fungicidal activities were studied using cultures of Staphylococcus aureus , Escherichia coli and Candida tenuis microorganisms. It was found that some of the studied compounds have moderate antibacterial and fungicide activity, which in more than 90 % cases coincided with the computational predictions. Analysis of structure – antimicrobial activity relationships provides the recommendations for design of new derivatives. Some other biological activities have been predicted by PASS for these compounds, including antiviral, antineoplastic, immunomodulator, acute neurological disease treatment, antiparkinsonian, etc., which help to identify areas for further research. Thus, it was shown that 1,4-naphthoquinone aminothiazole derivatives is a promising class for preparation of novel pharmacological agents for different indications. DOI: http://dx.doi.org/10.5755/j01.ct.61.3.2847","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"64 1","pages":"62-69"},"PeriodicalIF":0.0,"publicationDate":"2012-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82087268","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: 2

Investigation of ocular changes in children and young people with thyroid diseases before and after the treatment with 20 % honey solution eye drops 20%蜂蜜溶液滴眼液治疗儿童和青少年甲状腺疾病前后眼部变化的研究

the Chemical Technology Pub Date : 2012-10-26 DOI: 10.5755/J01.CT.61.3.2714

J. Jankauskiene, D. Jarusaitiene, V. Čeksterytė

{"title":"Investigation of ocular changes in children and young people with thyroid diseases before and after the treatment with 20 % honey solution eye drops","authors":"J. Jankauskiene, D. Jarusaitiene, V. Čeksterytė","doi":"10.5755/J01.CT.61.3.2714","DOIUrl":"https://doi.org/10.5755/J01.CT.61.3.2714","url":null,"abstract":"The objective of the study was to investigate ocular changes in children and young patients with thyroid diseases before and after the treatment with 20 % honey solution eye drops. There were examined 33 patients with thyroid diseases and corneal, conjunctival changes. There were 25 girls and 8 boys. Their age was from 6 to 29.5 years. Mean age of patients was 13.2 ± 3.7 years old. 17 patients were treated with 20 % honey solution eye drops, 16 – with artificial tears (three times a day, for 3 weeks). There was evaluated the state of eye conjunctiva and cornea, visual acuity, proptosis before and after the course of treatment. All patients underwent a complete ophthalmic examination including best-corrected Snellen visual acuity, slit–lamp, corneal sensitivity investigations and Hertel exophthalmometry. The treatment with 20 % honey eye drops reduced complaints of patients (photophobia, itching, foreign body sensation, tearing and pain of the eye ball), statistically significant improved visual acuity, status of conjunctiva (redness, swelling) and cornea (fluorescein staining, corneal sensitivity and erosions) in comparison with those patients who used artificial tears. There was no change in proptosis measurements after the treatment. We have found more positive effect of 20 % honey solution eye drops on the state of the conjunctiva and cornea in patients with thyroid diseases when the treatment was started at the early period of thyroid diseases while there were no corneal damages. 20 % honey solution eye drops reduced complaints of patients, statistically significant improved visual acuity, status of conjunctiva (redness, swelling) and cornea. Honey eye drops may be used to prevent conjunctival and corneal complications in patients with thyroid diseases and corneal, conjunctival changes. DOI: http://dx.doi.org/10.5755/j01.ct.61.3.2714","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"22 1","pages":"37-41"},"PeriodicalIF":0.0,"publicationDate":"2012-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73707589","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

Antimicrobial Efficiency of Photoactivated Chlorophyllin-Chitosan Complex 光活化叶绿素-壳聚糖配合物的抗菌效果

the Chemical Technology Pub Date : 2012-10-26 DOI: 10.5755/J01.CT.61.3.2710

I. Buchovec, R. Kokstaite, Ž. Lukšienė

引用次数: 4

The use of castor oil in the production of gamma-decalactone by Yarrowia lipolytica KKP 379 蓖麻油在多脂耶氏菌KKP 379生产-癸内酯中的应用

the Chemical Technology Pub Date : 2012-10-26 DOI: 10.5755/J01.CT.61.3.2717

J. Krzyczkowska

引用次数: 8