the Chemical Technology最新文献_第8页

Effect of extractive substances from spruce needle biomass on eggs production and quality 云杉针叶生物量提取物对卵产量和品质的影响

the Chemical Technology Pub Date : 2013-03-08 DOI: 10.5755/J01.CT.62.4.3120

I. Vītiņa, V. Krastiņa, A. Jemeļjanovs, S. Cerina, J. Mičulis, R. Aņenkova, B. Lujāne, K. Markovs, M. Daugavietis

{"title":"Effect of extractive substances from spruce needle biomass on eggs production and quality","authors":"I. Vītiņa, V. Krastiņa, A. Jemeļjanovs, S. Cerina, J. Mičulis, R. Aņenkova, B. Lujāne, K. Markovs, M. Daugavietis","doi":"10.5755/J01.CT.62.4.3120","DOIUrl":"https://doi.org/10.5755/J01.CT.62.4.3120","url":null,"abstract":"Extractive substances of spruce needles were produced from a forestry by-product – green biomass of spruce needles. Investigations were carried out to evaluate the effects of the additive of biologically active substances from spruce needles (total extractive, separate, neutral extractive and acidic extractive substances) on laying hens’ productivity and egg quality, to assess their effects on the innovative composition of hen eggs. The feeding trial was conducted with a cross Lohmann Brown laying hens by adding the total, neutral and acid extractive substances of spruce needles to the composition of trial group hens’ diet at the amount of 0.04–0.05 %. The control group did not receive additives of extractive substances. Using spruce needle extractive substances increased egg production on average by 2.10–4.86 %, egg weight by 3.86–7.50 %, and decreased feed conversion by 10.76–12.55 % in comparison with the control group ( p < 0.05). The use of the additive of neutral extractive substances in hens’ diet improved the content of a -linolenic acid by 0.35 %, total carotenoids by 2.31 mg kg -1 , and α-tocopherol by 3.20 mg 100 g -1 , but decreased the cholesterol level by 178.06 mg 100 g - 1 in egg yolk in comparison with the control group (commercial eggs). By using additives of neutral extractive substances in hens’ diet it was possible to obtain hen eggs of an innovative composition. DOI: http://dx.doi.org/10.5755/j01.ct.62.4.3120","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"67 1","pages":"40-44"},"PeriodicalIF":0.0,"publicationDate":"2013-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88333965","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

Production of marine distillate fuel oil from waste polypropylene 用废聚丙烯生产船用馏分燃料油

the Chemical Technology Pub Date : 2013-03-06 DOI: 10.5755/J01.CT.63.1.4516

R. Butkutė, L. Miknius

{"title":"Production of marine distillate fuel oil from waste polypropylene","authors":"R. Butkutė, L. Miknius","doi":"10.5755/J01.CT.63.1.4516","DOIUrl":"https://doi.org/10.5755/J01.CT.63.1.4516","url":null,"abstract":"A semibatch distillative thermolysis of polypropylene waste under 25, 40, 60 and 80 bar was performed. The yield of the resulting products and the distillation characteristics of the liquid thermolysis products depending upon the process conditions have been investigated. It was determined that as the pressure of the thermolysis process increased from 25 to 80 bars, the yield of the liquid product decreased from 74.7 to 62.6 %, whereas the yield of the gaseous product increased by 8.3 to 21.3 %. The liquid product obtained under higher pressure had more flat distillation characteristics, especially the distillate that boils off beyond 40 %, composed of lower molecular mas compounds. In order to assess the potential yield of thermolysis products for the production of the marine distillate fuel, there was set a dependence of the flash point of the liquid fraction upon the light component cut content. According to the ISO 8217:2012 specification, the quality characteristics of the obtained fractions have been investigated. The GC of the lightest liquid fraction (naphta), not suitable for a marine fuel because of a too low frash point, showed the predominance of isoparaffins – a useful feedstock for gasoline production. Carbon residue values of the liquid thermolysis product do not comply with the standard specification because of a significant content of alkenes and alkadienes. The latter at a higher temperature are particularly apt to polymerization, cyclization, and aromatization. During these reactions, carbon residue precursors are formed. The calculated yield of the obtained polypropylene thermolysis liquid fractions compatible with distillate marine fuels of summer and winter grades was 53 % for the ISO-F-DMX category and 41 % for the ISO-F-DMA and ISO-F-DMB categories which are used in the Lithuanian shipping fleet. DOI: http://dx.doi.org/10.5755/j01.ct.63.1.4516","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"31 1","pages":"28-33"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90506742","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

Attitude of Latvian consumers towards new products made from triticale flour blend 拉脱维亚消费者对小黑麦粉混合制成的新产品的态度

the Chemical Technology Pub Date : 2013-03-06 DOI: 10.5755/J01.CT.63.1.4515

M. Sabovics, E. Straumite, R. Galoburda, I. Kantiķe

{"title":"Attitude of Latvian consumers towards new products made from triticale flour blend","authors":"M. Sabovics, E. Straumite, R. Galoburda, I. Kantiķe","doi":"10.5755/J01.CT.63.1.4515","DOIUrl":"https://doi.org/10.5755/J01.CT.63.1.4515","url":null,"abstract":"Triticale ( Triticosecale wittmack ) is grown mostly for forage or animal feeding; nevertheless, some triticale-based food can be purchased at health food stores. Triticale has a potential in the production of bread and other food products such as pasta and breakfast cereals. The aim of the research was to evaluate a consumer’s attitude towards new by developed products made from whole-grain triticale, rye and hull-less barley flour, rice and maize flour. Other cereals besides triticale were used in the flour blend in order to obtain better baking properties. There were 113 respondents who participated in the questionnaire, of them 32 (28.3 %) men and 81 (71.7 %) women. Four samples were given to each respondent – 2 control samples (made from whole-grain wheat flour) and 2 developed products. In sensory evaluation, the experimental muffins and crackers were characterised using a 9-point hedonic scale (determination of overall acceptablity). The overall acceptability of the new products varied between 6.92 and 7.61 on the hedonic scale, which correspond to the acceptability from “like it a little” to “like it much”. One hundred and three respondents liked the new by developed products better than the traditional ones. The respondents wrote in the questionnaire that the new products were healthy and tasty, and they would like to buy them in retail shops. DOI: http://dx.doi.org/10.5755/j01.ct.63.1.4515","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"1 1","pages":"49-54"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86117825","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

Adsorption capacity of clinoptilolite for Zn2+ ions in alkaline solution 斜沸石对碱性溶液中Zn2+离子的吸附性能

the Chemical Technology Pub Date : 2013-03-06 DOI: 10.5755/J01.CT.63.1.4517

A. Iljina, A. Eisinas, K. Baltakys, A. Bankauskaitė, R. Šiaučiūnas

引用次数: 2

Microwave use of gypsum dehydration feasibility study 微波利用石膏脱水的可行性研究

the Chemical Technology Pub Date : 2013-03-06 DOI: 10.5755/J01.CT.63.1.4518

D. Kasparaitė, L. Lukošenkinaitė, Z. Valančius, N. Kybartienė, V. Leškevičienė

{"title":"Microwave use of gypsum dehydration feasibility study","authors":"D. Kasparaitė, L. Lukošenkinaitė, Z. Valančius, N. Kybartienė, V. Leškevičienė","doi":"10.5755/J01.CT.63.1.4518","DOIUrl":"https://doi.org/10.5755/J01.CT.63.1.4518","url":null,"abstract":"In this paper, we present the base techniques of a new fabrication procedure to obtain β-semy-hidrated calcium sulphate, β-plaster. The plaster is an aerial binder obtained through the dehydration of gypsum (CaSO 4 ×2H 2 O) and forming semy-hidrated calcium sulphate (CaSO 4 ×0,5H 2 O) at temperatures ranging between 110–160 °C. All plaster fabrication procedures used to this day are uneconomic. To obtain a larger deviated power, the application of a more intense electrical field is necessary. The dissipated power can also be increased by increasing the frequency; this can be done easily by using microwaves. They are applied more and more in industrial heating techniques, using high-frequency generators of a high powers and high-power magnetrons. The advantage of the microwave generators which use high-power magnetrons is that they are simple and cheap. The proposed fabrication procedure employs microwave energy and is based on the dielectric propriety of gypsum. As such, it is possible that the gypsum is dehydrated through dialectical heating into a resonant cavity with the microwave power. Water could absorb microwaves and increase the temperature rapidly within a short time. The results show that it is possible to use gypsum as a natural dielectric material in creating plaster through heating in a microwave field. Semi-hydrate produced under these conditions has the following characteristics: the beginning of binding 18–25 min., the end 28–37 min., compression strength after 2 h 2–5 MPa, compression strength of dried products 6–11 MPa. DOI: http://dx.doi.org/10.5755/j01.ct.63.1.4518","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"45 1","pages":"5-9"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90290456","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

The influence of 1,5-substituted 1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-2-one derivatives on the growth and productivity of narrow-leafed lupin (Lupinus angustifolius L.) 1,5-取代1,3,4,5-四氢- 2h -1,5-苯二氮卓-2- 1衍生物对狭叶露平生长和产量的影响

the Chemical Technology Pub Date : 2013-03-06 DOI: 10.5755/J01.CT.63.1.3307

R. Asakaviciute, Z. Maknickienė, R. Jančienė, Tomas Javorskis

{"title":"The influence of 1,5-substituted 1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-2-one derivatives on the growth and productivity of narrow-leafed lupin (Lupinus angustifolius L.)","authors":"R. Asakaviciute, Z. Maknickienė, R. Jančienė, Tomas Javorskis","doi":"10.5755/J01.CT.63.1.3307","DOIUrl":"https://doi.org/10.5755/J01.CT.63.1.3307","url":null,"abstract":"1-Oxopropyl- and 1-(2-nitrobenzoyl)-1,3,4,5-tetrahydro-2 H -1,5-benzodiazepine derivatives bearing various substituents – acyl-, alkyl- and nitroso groups, and polycyclic imidazo[1,2-a][1,5]- and quinazoline[3,2-a][1,5]benzodiazepines were synthesized, and their influence on the development of the narrow-leafed lupin ( Lupinus angustifolius L.) was investigated. The tests were performed under laboratory conditions, seeds of narrow-leafed lupin variety VB Derliai were germinated in Petri dishes. It was determined that nitrobenzamides were characterized by the strongest effect: 3-methyl-5-(2-nitrobenzoyl)-4-oxo-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine-1-carbaldehyde ( 4 i ) mostly stimulated the growth of lupin roots (5.52 ± 0.89 cm); the longest stem (3.76 ± 0.64 cm) was obtained using 5-benzyl-3-methyl-1-(2-nitrobenzoyl)-1,3,4,5-tetrahydro-2 H -1,5-benzodiazepine-2-one ( 4 j ), and the highest amount of lupin biomass (0.824 ± 0.074 g) was obtained using 5-acetyl-3-methyl-1-(2-nitrobenzoyl)-1,3,4,5-tetrahydro-2 H -1,5-benzodiazepine-2-one ( 4 h ). Two field trials were performed; lupin plants of the VB Derliai variety were sprayed once at the rosette stage and once at the rosette stage before bud formation, using 30 mg/l solution of 4 h – j compounds. Upon applying 4 i solution, plants grew by 22 % higher as compared with plants in the control plots. Application of the solution of 4 h – j compounds reduced the infestation of narrow-leafed lupin plants with Fusarium fungi by 31–46 % and with Colletotrichum fungi by 81–91 % as compared with the control. DOI: http://dx.doi.org/10.5755/j01.ct.63.1.3307","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"28 1","pages":"21-27"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77583339","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 stability of water-soluble modified starch iodophors 水溶性变性淀粉碘伏的稳定性

the Chemical Technology Pub Date : 2013-03-06 DOI: 10.5755/J01.CT.63.1.4519

V. Navikaitė, P. P. Danilovas, R. Klimaviciute, J. Bendoraitiene

{"title":"The stability of water-soluble modified starch iodophors","authors":"V. Navikaitė, P. P. Danilovas, R. Klimaviciute, J. Bendoraitiene","doi":"10.5755/J01.CT.63.1.4519","DOIUrl":"https://doi.org/10.5755/J01.CT.63.1.4519","url":null,"abstract":"Water-soluble starch derivatives were obtained by the oxidative destruction of native potato starch and cationic potato starch (DS = 0.06; 0.33; 0.66). High-performance liquid chromatography (HPLC) analysis revealed the molecular weight of such polysaccharides to decrease 30–500 times, and chemical analysis showed the appearance of new carbonyl and carboxyl groups up to 1.04 wt % and 0.2 wt %, respectively. The UV-VIS spectrophotometric analysis proved soluble cationic starch derivatives to form non-stoichiometric polyelectrolite complexes with anionic iodine species and non-cationic soluble starch to form blue inclusion complexes with iodine. Solutions of iodophor complexes having up to 10 wt % of iodine (according to the mass of iodophor) were formed. The stability of iodophors was compared with that of KI–I 2 and PVP–I 2 iodophors which are products widely used in medical applications. After 18 days of experiment, the highest stability was shown by soluble cationic starch (DS = 0.06) – iodine sample, where the loss of molecular iodine was up to 37 wt %. The loss of molecular iodine for soluble cationic starch (DS = 0.33) – iodine and PVP–I 2 samples was 80–85 wt %. The KI–I 2 solution showed the lowest stability, whereas no iodine was found after 7 days. The hydrolysis of iodine in the solutions of soluble cationic starch derivatives was 3–10 times faster as compared with that in KI–I 2 or PVP–I 2 solutions. The free iodine content was lowest in soluble cationic starch (DS = 0.06) and PVP–I 2 solutions; therefore, these two samples are considered to be most stable. DOI: http://dx.doi.org/10.5755/j01.ct.63.1.4519","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"26 1","pages":"34-41"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85535063","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

The influence of 3-(1H-Benzimidazol-2-yl)-4-phenylaminobutanoic acid sodium salt on summer rapeseed (Brassica napus L.) yield and oil quality 3-(1h -苯并咪唑-2-酰基)-4-苯基氨基丁酸钠盐对甘蓝型夏油菜产量和油质的影响

the Chemical Technology Pub Date : 2013-03-06 DOI: 10.5755/J01.CT.63.1.4514

Ramūnė Kolosej, V. Mickevičius, I. Jonuškienė, Z. Brazienė, E. Jakienė

引用次数: 0

The application of hierarchical cluster analysis for clasifying horseradish genotypes (Armoracia rusticana L.) roots 层次聚类分析在辣根基因型分类中的应用

the Chemical Technology Pub Date : 2013-01-30 DOI: 10.5755/J01.CT.62.4.3410

L. Tomsone, Z. Kruma, I. Alsina, L. Lepse

{"title":"The application of hierarchical cluster analysis for clasifying horseradish genotypes (Armoracia rusticana L.) roots","authors":"L. Tomsone, Z. Kruma, I. Alsina, L. Lepse","doi":"10.5755/J01.CT.62.4.3410","DOIUrl":"https://doi.org/10.5755/J01.CT.62.4.3410","url":null,"abstract":"Horseradish ( Armoracia rusticana L.) is a perennial herb belonging to the Brassicaceae family; it contains biologically active substances such as phenolic compounds. The aim of the present research was to clasify horseradish root genotypes, based on the total phenol content and antioxidant properties, using the hierarchical cluster analysis (HCA), and to compare them with clusters obtained from data of the molecular random amplified polymorphic DNA (RAPD) analysis. Plant phenolic compounds are among the most important primary antioxidants. The p henolic composition of plants is affected by different factors such as variety, genotype, climate, harvest time, storage, processing. Nine genotypes of horseradish roots harvested at three different times in the period from August to November 2011 were used. Several statistical methods can be used to assess differences in the horseradish genotypes. Using a univariate statistical analysis and standard deviations for each analyzed variable does not help to get a complete insight into the complex analysis. Multivariate statistical methods are appropriate tools for the analysis of a complex data matrix. The hierarchical cluster analysis (HCA) used in the current research is a simple way of grouping the set of available data by their similarities according to a set of selected variables. No similarities were found by clustering the genotypes according to the content of biologically active compounds and molecular analyses. DOI: http://dx.doi.org/10.5755/j01.ct.62.4.3410","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"28 1","pages":"52-56"},"PeriodicalIF":0.0,"publicationDate":"2013-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89284421","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: 9

The influence of different copper concentrations on barley grain sprouting and the content of total phenols 不同铜浓度对大麦籽粒发芽及总酚含量的影响

the Chemical Technology Pub Date : 2013-01-30 DOI: 10.5755/J01.CT.62.4.3411

K. Antoņenko, Viesturs Kreicbergs, M. Duma

{"title":"The influence of different copper concentrations on barley grain sprouting and the content of total phenols","authors":"K. Antoņenko, Viesturs Kreicbergs, M. Duma","doi":"10.5755/J01.CT.62.4.3411","DOIUrl":"https://doi.org/10.5755/J01.CT.62.4.3411","url":null,"abstract":"Barley is a major world crop ranked as the fourth most important cereal in terms of plant area. Barley is consumed around the world, mostly in the malted form in brewing industry. Recently, many investigations in malt production intensification with biologically active compounds or ferment preparations have been accomplished. However, comprehensive studies on the effect of copper additives on barley grain sprouting are still required. The aim of this study was to explore the influence of different copper concentrations on barley grain sprouting and on the content of total phenols. Barley grains of 92 % viability were soaked in different solutions (Cu 2+ concentration 10–500 mg/l) for 12 hours, left for sprouting at a temperature of 18 ± 2 °C for 5 days, and then dried in the oven for 48 hours at 50 ° C . The control sample of grain was soaked in deionized water. The sprouting activity of the grain was determined after sprouting, whereas the content of total phenols was determined after the grain had dr ied out . The obtained results show that at the copper concentration of 10–50 mg/l , barley grain sprouting activity increases essentially. At the copper concentration of 100 mg/l, barley grain sprouting decreases sharply; moreover, at the copper concentration of 500 mg/l no barley grain sprouting activity was detected. The highest content of total phenols was observed when copper concentration in the solution was 50 mg/l. DOI: http://dx.doi.org/10.5755/j01.ct.62.4.3411","PeriodicalId":22505,"journal":{"name":"the Chemical Technology","volume":"96 1","pages":"57-60"},"PeriodicalIF":0.0,"publicationDate":"2013-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75870588","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