Skocz do pozycji: 1.

Tytuł:

Model radioisotope experiments on the influence of acid rain on 65Zn binding with humic acid

Autorzy:

Koczorowska, E.
Mieloch, M.
Slawinski, J.

Powiązania:

https://bibliotekanauki.pl/articles/147092.pdf

Data publikacji:

2002

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

acid rain
complexation
humic acid
sulphuric acid
zinc

Opis:

Acid rain formed first of all from sulphur oxide emitted by natural and anthropogenic sources, may change the biological equilibrium and the metal stoppage in the soil. The model experiments were performed to determine the influence of acid rain on zinc bond with humic acid (HA). The samples were prepared in glass columns with quartz sand and overlaid HA or HA+65Zn radioisotope that simulates natural conditions. Then, solutions of H2SO4 were introduced into the sand HA layer. Zinc was washed with diluted (10 4 10 3 M) sulphuric acid as the simulation of acid rain. The recovery of injected radiotracer ions in eluates was found to depend on pH of simulated acid rain. The results help to evaluate the migration behaviour of zinc in the presence of HA and H2SO4. The model studies illustrate the considerable influence of sulphuric acid on chemical degradation of HA.

Źródło:

Nukleonika; 2002, 47, 4; 167-171
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

A note on distribution of human plasma levels of ascorbic and dehydroascorbic acid

Autorzy:

Capellmann, M
Becka, M.
Bolt, H.M.

Powiązania:

https://bibliotekanauki.pl/articles/70840.pdf

Data publikacji:

1994

Wydawca:

Polskie Towarzystwo Fizjologiczne

Tematy:

ascorbic acid
plasma
dehydroascorbic acid
ascorbic acid concentration

Źródło:

Journal of Physiology and Pharmacology; 1994, 45, 1
0867-5910

Pojawia się w:

Journal of Physiology and Pharmacology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Natural phenolic acids may increase serum estradiol level in ovariectomized rats

Autorzy:

Zych, Maria
Folwarczna, Joanna
Trzeciak, Henryk

Powiązania:

https://bibliotekanauki.pl/articles/1040548.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

rat
estradiol
p-coumaric acid
chlorogenic acid
body mass
caffeic acid
ferulic acid

Opis:

Natural phenolic acids are commonly present in plants consumed in the diet. Recently we have observed that different natural phenolic acids exert differential effects on the body mass gain in ovariectomized and non-ovariectomized female rats. The aim of the present study was to investigate the effects of ferulic, caffeic, p-coumaric and chlorogenic acids on serum estradiol and total cholesterol levels in ovariectomized and non-ovariectomized rats. The experiments were carried out on 3-month old female Wistar Cmd:(WI)WU rats, divided into following groups (n=8 in each group): non-ovariectomized control rats and non-ovariectomized rats receiving ferulic, caffeic, p-coumaric or chlorogenic acids, sham-operated control rats, ovariectomized control rats and ovariectomized rats receiving the same phenolic acids. The phenolic acids were administered at a dose of 10 mg/kg p.o. daily for 4 weeks. Serum estradiol and total cholesterol levels on the next day after the last administration of the phenolic acids were examined. The phenolic acids did not affect serum estradiol or total cholesterol levels in non-ovariectomized rats. In ovariectomized rats, caffeic acid and to a lesser extent p-coumaric acid increased serum estradiol level, which effect correlated with a decreased body mass gain. All the phenolic acids decreased serum cholesterol level in ovariectomized rats. Concluding, the anti-obesity activity of some phenolic acids may be, at least partially, connected with estrogenic pathways.

Źródło:

Acta Biochimica Polonica; 2009, 56, 3; 503-507
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Seasonal proximate and fatty acid variations of some seaweeds from the Northeastern Mediterranean coast

Autorzy:

Polat, S.
Ozogul, Y.

Powiązania:

https://bibliotekanauki.pl/articles/48220.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Instytut Oceanologii PAN

Tematy:

fatty acid
seaweed
Mediterranean coastal zone
nutritional value
macroalga
protein content
gas chromatography
eicosapentaenoic acid
docosahexaenoic acid
essential fatty acid
fatty acid methyl ester
polyunsaturated fatty acid
fatty acid profile
seasonal variation

Źródło:

Oceanologia; 2013, 55, 2
0078-3234

Pojawia się w:

Oceanologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Oil content and composition in seeds of Camelina sativa and Crambe abyssinica cultivars

Autorzy:

Marsalkiene, N.
Zilenaite, L.
Karpaviciene, B.

Powiązania:

https://bibliotekanauki.pl/articles/1192479.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

oil composition
glucosinolate
fatty acid
erucic acid
linolenic acid

Opis:

The aim of the study was to evaluate seed oil content and oil composition in five Camelina sativa and four Crambe abyssinica cultivars as an interaction of a genotype and the climatic conditions in Lithuania. The studied species differed in the seed oil content, glucosinolate content in oil and oil fatty acid composition. The oil content was 22.1-42.5% in dry matter of camelina seeds and 23.4-36.6% in crambe seeds. The glucosinolate content varied from 61.8 to 68.6 µmol g-1 in oil of crambe, and from 8.6 to 30.5 µmol g-1 in oil of camelina. The oil content in seeds and glucosinolate content in oil of each species differed between the research years but not between the cultivars. The glucosinolate content in oil correlated significantly with the oil content in dry matter of seeds. However, this correlation was negative for camelina (rs=-0.59, p=0.045) and positive for crambe (rs=0.86, p=0.007). Camelina oil was characterised by the dominance of linolenic acid (34.8-41.6%), while crambe oil was predominated by erucic acid (53.0-60.9%). The second most abundant fatty acid in oil of both species was oleic acid, whose amount did not differ between the species. At the same time, the content of all other studied fatty acids differed significantly between both species. Our study indicated that variation in seed oil content, glucosinolate content and fatty acid composition in each studied species was much less affected by inheritable features of cultivars than by meteorological conditions in the research years.

Źródło:

Journal of Elementology; 2020, 25, 4; 1399-1412
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Kinetics and reaction pathways of total acid number reduction of cyclopentane carboxylic acid using subcritical methanol

Autorzy:

Mandal, P. C.
Nagarajan, T.

Powiązania:

https://bibliotekanauki.pl/articles/777903.pdf

Data publikacji:

2016

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

cyclopentane carboxylic acid
subcritical methanol
total acid number
naphthenic acid
activation energy

Opis:

Cyclopentane carboxylic acid (CPCA) is a model compound of Naphthenic acids (NAs). This objective of this paper is to discover total acid number (TAN) reduction kinetics and pathways of the reaction between CAPA and subcritical methanol (SubC-MeOH). The experiments were carried out in an autoclave reactor at temperatures of 180-220°C, a methanol partial pressure (MPP) of 3 MPa, reaction times of 0-30 min and CPCA initial gas phase concentrations of 0.016-0.04 g/mL. TAN content of the samples were analyzed using ASTM D 974 techniques. The reaction products were identified and quantified with the help of GC/MS and GC-FID respectively. Experimental results reveal that TAN removal kinetics followed first order kinetics with an activation energy of 13.97 kcal/mol and a pre-exponential factor of 174.21 s^-1. Subcritical methanol is able to reduce TAN of CPCA decomposing CPCA into new compounds such as cyclopentane, formaldehyde, methyl acetate and 3-pentanol.

Źródło:

Polish Journal of Chemical Technology; 2016, 18, 3; 44-49
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Variability of fatty acid composition in seed oil of winter rapeseed (Brassica napus L.) developed through mutagenesis
Zmiany składu kwasów tłuszczowych w nasionach rzepaku ozimego (Brassica napus L.) uzyskane na drodze mutagenezy

Autorzy:

Spasibionek, S.

Powiązania:

https://bibliotekanauki.pl/articles/833214.pdf

Data publikacji:

2008

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

variability
fatty acid composition
seed oil
winter rapeseed
rapeseed
Brassica napus
mutagenesis
chemical mutagenesis
fatty acid
oleic acid
linoleic acid
linolenic acid
desaturation

Źródło:

Rośliny Oleiste - Oilseed Crops; 2008, 29, 2
1233-8273

Pojawia się w:

Rośliny Oleiste - Oilseed Crops

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Microemulsions as Carriers of Omega-3 Polyunsaturated Fatty Acids
Mikroemulsje jako nośniki kwasów tłuszczowych omega-3

Autorzy:

GÓRSKA, Anna
KRUPA, Anna

Powiązania:

https://bibliotekanauki.pl/articles/1033822.pdf

Data publikacji:

2013

Wydawca:

Zakład Opieki Zdrowotnej Ośrodek Umea Shinoda-Kuracejo

Tematy:

docosahexaenoic acid (DHA)
eicosapentaenoic acid (EPA)
functional foods
microemulsions
microencapsulation
α-linolenic acid

Opis:

Design of novel foodstuffs rich in natural bioactive substances is one of the main research field in the food industry. There are many clinical reports on beneficial effects of either docosahexaenoic acid (DHA) or eicosapentaenoic acid (EPA) on health. In general n-3 polyunsaturated fatty acids (n-3 PUFAs) are significant structural components of cell membranes. Since DHA and EPA represent exogenous fatty acids, their level in the human body depends on the dietary intake. Therefore there is a need to enrich food by bioactive compounds. It has been shown that the application of polyunsaturated fatty acids such as α-linolenic acid in traditional foodstuffs permits to obtain a kind of functional food that can be used to improve both health and skin condition. However low stability of natural bioactive components limits their application in food, especially on an industrial scale. Due to this fact efforts are made to prepare new functional food formula containing n-3 PUFAs in a stable form. Microencapsulation process is a well known attempt to prevent their oxidation. Preparation of food-grade microemulsions containing polyunsaturated fatty acids to improve the stability and to ensure pleasant sensory properties of food is discussed in the present study.

Źródło:

Medicina Internacia Revuo; 2013, 25, 101; 211- 219
0465-5435

Pojawia się w:

Medicina Internacia Revuo

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

The effect of oleic and linoleic acid addition to the culture media on bovine embryonic development following vitrification

Autorzy:

Karaşahin, T.

Powiązania:

https://bibliotekanauki.pl/articles/2087426.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

embryo
linoleic acid
oleic acid
vitrification

Źródło:

Polish Journal of Veterinary Sciences; 2019, 4; 661-666
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:

Consumption of fish and seafood by pregnant Polish women and the supply of docosahexaenoic acid and eicosapentaenoic acid from these products

Autorzy:

Broś-Konopielko, Magdalena
Białek, Agnieszka
Oleszczuk-Modzelewska, Luiza
Zaleśkiewicz, Barbara
Różańska-Walędziak, Anna
Teliga-Czajkowska, Justyna
Tokarz, Andrzej
Czajkowski, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/551953.pdf

Data publikacji:

2017

Wydawca:

Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych

Tematy:

fish
pregnancy
diet
eicosapentaenoic acid
seafood
docosahexaenoic acid.

Źródło:

Family Medicine & Primary Care Review; 2017, 3; 191-195
1734-3402

Pojawia się w:

Family Medicine & Primary Care Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Changes of physico-chemical properties of rapeseed proteins during the technological process of protein concentrate production. Part II
Zmiany właściwości fizykochemicznych białek rzepaku w procesie technologicznym otrzymywania koncentratu, cz. II

Autorzy:

Kostyra, E.
Kozłowska, H.
Kostyra, H.

Powiązania:

https://bibliotekanauki.pl/articles/1396351.pdf

Data publikacji:

1985

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

amino acids
aspartic acid
levulinic acid
hexose deformination

Opis:

The work presents a characteristic of some elements of the protein conformation of albumin and globulin fractions isolated from rapeseed meal and rapeseed protein concentrate (see Part I). Investigations were based on spectrophotometry in the ultraviolet and infrared radiation, and on circular dichroism. The proportion of alpha, beta and gamma structures was determined in rapeseed and concentrate albumin and globulin fractions.
W pracy scharakteryzowano niektóre elementy konformacji białek frakcji albumin i globulin wyizolowanych z mączki i koncentratu białkowego uzyskanych z nasion rzepaku (patrz cz. I). Badania przeprowadzono przy wykorzystaniu spektrofotometrii w ultrafiolecie i podczerwieni oraz dichroizmu kołowego. W celu stwierdzenia obecności w frakcjach albumin i globulin koncentratu i nasion rzepaku kwasów nukleinowych poddano je hydrolizie kwasem mrówkowych, a następnie badaniom spektrofotometrycznym w UV. Szczególnie interesujące okazało się widmo frakcji albumin nasion rzepaku, które charakteryzowało się pasmem absorpcji przy 320 nm. Pojawienie się tego pasma można wytłumaczyć obecnością kwasów fenolowych związanych z tą frakcją. Zaobserwowany przy 260 i 280 nm wzrost absorbancji w przypadku frakcji globulin nasion rzepaku po ogrzewaniu z kwasem mrówkowym można wytłumaczyć obecnością związanych z tą frakcją kwasów nukleinowych, Analiza widm w podczerwieni frakcji albumin i globulin nasion rzepaku i koncentratu pozwoliła na wyznaczenie procentowej zawartości β struktury, która w obu frakcjach globulin wynosiła 140/o, a w albuminach odpowiednio 18 i 17%. Analiza tych widm sugerowała również obecność w badanych frakcjach składników niebiałkowych, jak stwierdzone wcześniej kwasy fenolowe i nukleinowe. Wyniki badań tych samych frakcji za pomocą dichroizmu kołowego pozwoliły na określenie procentowych zawartości poszczególnych struktur α, β i γ. Wartości te wynosiły odpowiednio dla: albumin koncentratu 37,8, 21,7 i 40,7%, globulin nasion rzepaku 57,1, 14,3 i 28,6%, globulin koncentratu 50,2, 12,1 i 37,6%.

Źródło:

Acta Alimentaria Polonica; 1985, 11, 3; 297-304
0137-1495

Pojawia się w:

Acta Alimentaria Polonica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:

Phenolic acids of walnut (Juglans regia L.)
Kwasy fenolowe orzecha włoskiego (Juglans regia L.)

Autorzy:

Chrzanowski, G.
Leszczynski, B.
Czerniewicz, P.
Sytykiewicz, H.
Matok, H.
Krzyzanowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/72516.pdf

Data publikacji:

2011

Wydawca:

Instytut Włókien Naturalnych i Roślin Zielarskich

Tematy:

phenolic acid
walnut
Juglans regia
hydroxycinnamic acid
hydroxybenzoic acid
plant organ

Opis:

The chromatographic separations showed the presence of eleven free phenolic acids (trans-cinnamic, o-coumaric, p-coumaric, chlorogenic, ferulic, gallic, caffeic, p-hydroxybenzoic, syringic, tannic and vanillic) in the walnut tissues. The p-hydroxybenzoic acid was a predominant compound in the green husks (618.8 µg·g-1), though, high content of it was found in leaves obtained in July (478.3 µg·g-1). The content of chlorogenic acid in green husks of walnut (306.7 µg·g-1) was twice higher than that in the leaves obtained in July. Similar level of coumaric acids was determined in the leaves and green husks (o-coumaric: 42.4–48.2 µg·g-1; p-coumaric: 78.6–94.3 µg·g-1), though, o-coumaric acid was not found in May-leaves. Moreover, leaves of walnut possessed high content of caffeic acid (leaves obtained in May – 456.9; leaves obtained in July – 262.1 µg·g-1) and ferulic acid (leaves obtained in May – 93.5; leaves obtained in July – 292.5 µg·g-1). The predominant compound of the male inflorescences was vanillic acid (359.5 µg·g-1). The green husks of walnut were rich in polyphenolic acids, syringic (427.0 µg·g-1) and tannic (237.4 µg·g-1). However, the content of tannic acid was higher in the leaves - especially in leaves collected in May (350.7 µg·g-1). In tested tissues of walnut, gallic acid was found in the lowest concentration (male inflorescences – 32.7 µg·g-1and leaves obtained in July – 12.7 µg·g-1). In general, there was a great variation in a level of the phenolic acids between the studied organs of the walnut; nevertheless, walnut tissues are precious source of phenolic acids.
Analiza chromatograficzna kwasów fenolowych ekstrahowanych z tkanek orzecha włoskiego wykazała obecność jedenastu kwasów: trans-cynamonowego, chlorogenowego, ferulowego, galusowego, kawowego, o- i p-kumarowego, p-hydroksybenzoesowego, syryngowego, taninowego i wanilinowego. Dominującym związkiem zielonych owocni orzecha włoskiego (618,8 µg·g-1) oraz liści zbieranych w lipcu (478,3 µg·g-1) był kwas p-hydroksybenzoesowy. Najwyższą zawartość kwasu chlorogenowego (306,7 µg·g-1), dwukrotnie większą niż w liściach stwierdzono w zielonych owocniach. Stwierdzono, że zawartość kwasów kumarowych w liściach i zielonych owocniach była na podobnym poziomie (kwas o-kumarowy: 42,4–48,2 µg·g-1, kwas p-kuamrowy: 78,6-94,3 µg·g-1), przy czym liście zbierane w maju nie zawierały kwasu o-kumarowego. Ponadto liście orzecha włoskiego bogate były w kwas kawowy (majowe – 456,9, lipcowe – 262,1 µg·g-1) oraz ferulowy (majowe – 93,5, lipcowe – 292,5 µg·g-1). Dominującym składnikiem kwiatostanów męskich był kwas wanilinowy (359,5 µg·g-1). Zielone owocnie orzecha bogate były również w kwasy polifenolowe, syryngowy (427,0 µg·g-1) oraz taninowy (237,4 µg·g-1), chociaż zawartość kwasu taninowego wyższa była w liściach, zwłaszcza zbieranych w maju (350,7 µg·g-1). W badanych organach orzecha, najniższym stężeniem charakteryzował się kwas galusowy i jego obecność wykazano jedynie w męskich kwiatostanach (32,7 µg·g-1) oraz liściach zbieranych w lipcu (12,7 µg·g-1). Phenolic acids of walnut (Juglans regia L.) Podsumowując należy stwierdzić, że organy orzecha włoskiego charakteryzuje duża zmienność w zawartości kwasów fenolowych, niemniej orzech włoski stanowi cenne źródło kwasów fenolowych.

Źródło:

Herba Polonica; 2011, 57, 2
0018-0599

Pojawia się w:

Herba Polonica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:

Extraction equilibria of hypophosphorous, phosphorous and phosphoric acids by toluene solution of tri-n-octylamine

Autorzy:

Sana, T.
Shiomori, K.
Kawano, Y.

Powiązania:

https://bibliotekanauki.pl/articles/347049.pdf

Data publikacji:

2003

Wydawca:

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej

Tematy:

hypophosphorous acid
phosphorous acid
phosphoric acid
tri-n-octylamine
extraction equilibrium

Opis:

The extraction equilibria of hypophosphorous, phosphorous and phosphoric acids with tri-n-octylamine as an extractant in toluene were measured at 303K. Under these conditions, undissociated acid (A’) reacts with the amine (B) to form various complexes in toluene. The complexes formed and equilibrium constants were estimated by a graphical analysis method. The complexes formed in these systems were found to be A’nB type species for hypophosphorous acid, A’nBm type species for phosphorous acid, (A'B)n type species for phosphoric acid, respectively. The experimental results could be explained by reaction models and equilibrium constants for each acid.

Źródło:

Ars Separatoria Acta; 2003, 2; 125-138
1731-6340

Pojawia się w:

Ars Separatoria Acta

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:

Badanie stężenia kwasu mlekowego, otrzymanego w procesie fermentacji mlekowej laktozy, zawartej w serwatce poprodukcyjnej przy udziale Lactobacillus
Study of concentration of lactic acid obtained in the process of lactic fermentation of lactose contained in the spent whey using Lactobacillus

Autorzy:

Maślanka, S.
Kos, A.
Bańczyk, M.
Czopek, I.
Adam, Ł.
Dorszewska, J.
Starczewska, K.

Powiązania:

https://bibliotekanauki.pl/articles/141850.pdf

Data publikacji:

2015

Wydawca:

Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem

Tematy:

kwas mlekowy
bakterie kwasu mlekowego
serwatka kwaśna
lactic acid
lactic acid bacteria
acid whey

Opis:

Serwatka kwaśna jest groźnym ekologicznie odpadem, będącym produktem ubocznym powstającym w przemyśle mleczarskim. Z uwagi na wysoką zawartość laktozy, odpad ten może być wykorzystywany jako surowiec w procesie fermentacji mlekowej, w którym ulega dalszej przemianie do kwasu mlekowego, przy udziale bakterii fermentacji mlekowej. Niniejsza publikacja stanowi przegląd literaturowy dotyczący procesu fermentacji mlekowej oraz opis badań własnych nad efektywnością procesu fermentacji mlekowej laktozy, pozyskanej z serwatki poprodukcyjnej, do kwasu mlekowego.
Acid whey is an environmentally hazardous waste which is a by-product produced in the dairy industry. Due to the high lactose content, the waste can be used as a raw material for lactic fermentation process, where it is converted further to lactic acid using lactic acid bacteria. This publication is a literature review on lactic acid fermentation process and includes description of own research on efficiency of lactic acid fermentation of lactose, obtained from spent whey, to lactic acid.

Źródło:

Chemik; 2015, 69, 4; 241-251
0009-2886

Pojawia się w:

Chemik

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Chemical treatment of kaolin. Case study of kaolin from the Tamazert– Jijel mine

Autorzy:

Chouafa, M.
Idres, A.
Bouhedja, A.
Talhi, K.

Powiązania:

https://bibliotekanauki.pl/articles/89198.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

kaolin
hydrochloric acid
sulfuric acid
acetic acide

Opis:

The Tamazert-Jijel kaolin deposit is located in eastern Algeria, It was formed during a process of hydro-thermal alteration of feldspars rich in potassium. Kaolin, obtained at the mine, mainly contains varying amounts of impurities such as iron oxide (Fe2O3) and anatase (TiO2). These components negatively affect the quality of the commercial product. This research was performed to improve the quality of kaolin to be used in the paper industry with the goal of reducing the impurities of iron and titanium oxides. Different sized fractions of the original sample were analyzed by XRD. The results obtained showed that the mineralogical composition is: quartz, muscovite, kaolinite, dolomite, albite and orthoclase. Kaolin, like all clays, has a thin dissemination of minerals throughout it. After processing kaolin, the particle size fraction of less than 45μm, corresponding to the liberation mesh size, was retained for purification by chemical treatment with different acids of different concentrations (hydrochloric acid, sulfuric acid, acetic acid), heated to boiling point temperatures. The kaolin samples treated with the various acids above were analyzed by X-ray fluorescence and by XRD. The results obtained from the sample treated with hydrochloric acid show that the iron oxide content of acid is reduced by 1.65% to 0.88%. Meanwhile, the brightness of the sample reached 90% under the effect of the treatment with hydrochloric acid at concentration of 2 mole/dm3.

Źródło:

Mining Science; 2015, 22; 171-180
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Assessing influence of hydrochloric acid leaching on structural changes and bleaching performance of Nigerian clay from Udi

Autorzy:

Ajemba, R. O.
Onukwuli, O. D.

Powiązania:

https://bibliotekanauki.pl/articles/110317.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

acid leaching
adsorption
bleaching
hydrochloric acid
isotherm

Opis:

Clay from Udi in Nigeria was mined, ground, and acid-leached at different concentrations of hydrochloric acid to produce adsorbents of varying properties. The raw and acid-leached samples were characterized using x-ray fluorescence (XRF) and Fourier transforms infra-red spectroscopy (FTIR) to examine the structural modifications in the clay as a result of acid-leaching. The analysis showed that the acid-leaching process caused several modifications of the clay samples. The surface area, Si/[Al + Fe + Mg] ratio, adsorption capacity were found to have increased in the acid-leached samples. The acid-leached samples were tested in order to ascertain their performance in bleaching palm oil and it was observed that the bleaching efficiency increased from 29.8% to 66.7%. The acid-leached sample prepared with 7M hydrochloric acid yielded an adsorbent that was efficient in bleaching palm oil under the experimental conditions. The isotherm analysis showed that the bleaching process followed the Freundlich equation.

Źródło:

Physicochemical Problems of Mineral Processing; 2014, 50, 1; 349-358
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Characterization of health-related properties of selected tree-nuts - a review

Autorzy:

Król, Katarzyna
Ponder, Alicja
Kopczyńska, Klaudia
Misztal, Karolina

Powiązania:

https://bibliotekanauki.pl/articles/1065264.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

fatty acid composition
flavonoids
nuts
phenolic acid
tree nut

Opis:

As interest in the health effects of tree-nuts consumption has increased. Nuts are vary used in food industry, especially in confectionery industry, in milk products, chocolate products and ice cream. This nuts are also added to products dedicated for healthy breakfast like muesli, cereals, breads and salads. The consumption of nuts is frequently associated with reduction in risk factors for diabetes, cancer, cardiovascular diseases. Despite high fat and caloric content, several studies have reported beneficial effects after nut consumption, due to fatty acid profiles, sterols, proteins, fibers, vitamins, minerals, tocopherols, flavonoids and phenolic acid with potential antioxidant and anti-inflammatory properties. Daily intake up to 30-40 g per day of nuts are recommended. This review highlights the composition of eight nut varieties (walnuts, almonds, hazelnuts, cashews, pistachios, Brazilian nuts, pecan nuts, macadamia nuts) on the context of human health.

Źródło:

World Scientific News; 2019, 135; 116-128
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Purification and characterization of GlcNAc-6-P 2-epimerase from Escherichia coli K92

Autorzy:

Ferrero, Miguel
Martínez-Blanco, Honorina
Lopez-Velasco, Federico
Ezquerro-Sáenz, Carlos
Navasa, Nicolas
Lozano, Sofia
Rodríguez-Aparicio, Leandro

Powiązania:

https://bibliotekanauki.pl/articles/1041092.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

sialic acid
capsular polysialic acid
N-acetylglucosamine
2-epimerase

Opis:

N-Acetylmannosamine (ManNAc) is the first committed intermediate in sialic acid metabolism. Thus, the mechanisms that control intracellular ManNAc levels are important regulators of sialic acid production. In prokaryotic organisms, UDP-N-acetylglucosamine (GlcNAc) 2-epimerase and GlcNAc-6-P 2-epimerase are two enzymes capable of generating ManNAc from UDP-GlcNAc and GlcNAc-6-P, respectively. We have purified for the first time native GlcNAc-6-P 2-epimerase from bacterial source to apparent homogeneity (1 200 fold) using Butyl-agarose, DEAE-FPLC and Mannose-6-P-agarose chromatography. By SDS/PAGE the pure enzyme showed a molecular mass of 38.4 ± 0.2 kDa. The maximum activity was achieved at pH 7.8 and 37°C. Under these conditions, the Km calculated for GlcNAc-6-P was 1.5 mM. The 2-epimerase activity was activated by Na+ and inhibited by mannose-6-P but not mannose-1-P. Genetic analysis revealed high homology with bacterial isomerases. GlcNAc-6-P 2-epimerase from E. coli K92 is a ManNAc-inducible protein and is detected from the early logarithmic phase of growth. Our results indicate that, unlike UDP-GlcNAc 2-epimerase, which promotes the biosynthesis of sialic acid, GlcNAc-6-P 2-epimerase plays a catabolic role. When E. coli grows using ManNAc as a carbon source, this enzyme converts the intracellular ManNAc-6-P generated into GlcNAc-6-P, diverting the metabolic flux of ManNAc to GlcNAc.

Źródło:

Acta Biochimica Polonica; 2007, 54, 2; 387-399
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Physico-chemical properties and fatty acid composition of Lagneraria siceraria seed oil

Autorzy:

Magu, T. O.
Sunday, E. A.
Louis, H.
Upla, P. U.
Ukpanah, M. A.
Nyong, B. E.

Powiązania:

https://bibliotekanauki.pl/articles/1118076.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Cucurbitaceae
Lagenaria siceraria
Linoleic acid
fatty acid
seed oil

Opis:

Oil was extracted from the dehulled seeds of Lagneraria siceraria (bottle gourd) and analysed for physico-chemical properties, as well a fatty acid composition. Standard procedures were employed in all analysis. The seed oil was liquid at room temperature with percentage yield (23.65%). The oil was characterized in terms of specific gravity (0.918 g/cm3), refractive index (1.34), viscosity (26.46 X 103 poise), melting point (11-14.5 °C), moisture content (0.18%), saponification value (203.36 mg KOH/g), unsaponifiable matter (7.13%), iodine value (46.1 g/100g), peroxide value (7.5 meq/kg), free fatty acid value (18.42%), acid value (60.02 mg KOH/g) and ester value (143.34 mg KOH/g). It was also classified as non- drying (iodine value ˂115 g/100 g). The peroxide value indicates that the oil is less prone to rancidity with iodine value less than 30meq/kg. The high saponification value qualifies it for use in the manufacture of soaps and shampoos. Four classes of fatty acid were identified in the oil: palmitic acid (C16:1) (13.5 ± 0.21), stearic acid (C18:1) (6.5 ± 0.96), oleic acid (C18:1) (11.6 ± 0.62) and linoleic acid (C18:2) (68.4 ± 0.13). Linoleic acid was the most abundant fatty acid in the oil. The fatty acid content of the oil reveals that L. Siceraria seed oil could be a rich source of oil for domestic and industrial purposes if exploited.

Źródło:

World News of Natural Sciences; 2017, 10; 70-79
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

A Case Study in Cianjur West Java, Indonesia: A Correlation Humic and Fulvic Acids with Mineralogical Composition and Physico-Chemical Analysis Using Partial Least Square

Autorzy:

Mulyani, Oviyanti
Joy, Benny
Kurnia, Dikdik

Powiązania:

https://bibliotekanauki.pl/articles/1838395.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

soils properties
humic acid
fulvic acid
partial least square

Opis:

Humic and fulvic acids are important materials for the health of the soil. This is related to the capability of humic and fulvic acids as chelating agent for pollutant in soil. The relationship between humic and fulvic acids with that of the soil properties is an important aspect to determine the characteristics of soil. Furthermore, production of humic and fulvic acids is a time-consuming process with several stages. Regarding this problem, the selection of sample size to study humic and fulvic acids is important. The relationship between the soil properties was analysed using the Partial Least Square (PLS) analysis, which is regarded as a solution to solve the analysis of complicated problems by offering a powerful approach. This study aimed to analyse the relationship between humic and fulvic acids, in terms of their mineral and physicochemical properties using the PLS method. The study was carried out in West Java, Indonesia. The results showed that the relationship between the chemical, physical, mineral contents with humic and fulvic acids, affected the negative and positive aspects of the relationship. Humic acids had a weak to good model category (0.269–0.940) with regards to the soil properties, and fulvic acids had a moderate model category (0.495–0.603) against all soil properties. Thus, the PLS method can solve a problem in study relationship between the soil properties with small sample and can help in understanding the soil characteristics in general.

Źródło:

Journal of Ecological Engineering; 2021, 22, 5; 191-204
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Application of nanofiltration in the process of the separation of model fermentation broths components

Autorzy:

Staszak, K.
Woźniak, M. J.
Karaś, Z.
Staniewski, J.
Prochaska, K.

Powiązania:

https://bibliotekanauki.pl/articles/778225.pdf

Data publikacji:

2013

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

nanofiltration
ceramic membrane
fumaric acid
succinic acid
erythritol
glycerol

Opis:

The effectiveness of nanofiltration with the use of ceramic membranes in the process of concentration and separation of fumaric acid or succinic acid from glycerol and citric acid from erythritol was evaluated. It was found that the retention of sodium salts of the acids investigated increased strongly with increasing the pH of the feed solution (depending on the degree of dissociation), while the retention degrees of di- and tricarboxylic acids, erythritol or glycerol were lower than 2%, irrespective of the initial concentration of the solution to be filtered. The results obtained showed that nanofiltration can be considered as one of the purification steps in the process of recovery of salts of organic acids from fermentation broth.

Źródło:

Polish Journal of Chemical Technology; 2013, 15, 4; 1-4
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

The 1st Conference on Contemporary Problems of Geochemistry

Autorzy:

Migaszewski, Zdzisław M.
Gałuszka, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/2086497.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

acid mine drainage
pollution sources
acid precipitation
natural disasters

Opis:

This issue of “Mineralogy” includes selected papers based on some oral and poster presentations of the 1st Geochemical Conference on “Contemporary Problems of Geochemistry” organized by the Geochemical Group of the Mineralogical Society of Poland and Jan Kochanowski University in Kielce. The conference was held at the Institute of Chemistry of Jan Kochanowski University in Kielce on 27–30 September 2010.

Źródło:

Mineralogia; 2011, 42, 1; 3--5
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:

The 1st Conference on Contemporary Problems of Geochemistry

Autorzy:

Migaszewski, Z. M.
Gałuszka, A.

Powiązania:

https://bibliotekanauki.pl/articles/2086533.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

acid mine drainage
pollution sources
acid precipitation
natural disasters

Opis:

This issue of “Mineralogy” includes selected papers based on some oral and poster presentations of the 1st Geochemical Conference on “Contemporary Problems of Geochemistry” organized by the Geochemical Group of the Mineralogical Society of Poland and Jan Kochanowski University in Kielce. The conference was held at the Institute of Chemistry of Jan Kochanowski University in Kielce on 27–30 September 2010.

Źródło:

Mineralogia; 2011, 42, 1; 3--5
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

The content of ascorbic and dehydroascorbic acids and vitamin C in non-preserved juices, depending on their type and storage time

Autorzy:

Drywien, M.E.
Frackiewicz, J.
Szpoton, S.

Powiązania:

https://bibliotekanauki.pl/articles/2082839.pdf

Data publikacji:

2021

Wydawca:

Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny

Tematy:

vitamin C
ascorbic acid
dehydroascorbic acid
non-preserved juices

Opis:

Background. Vitamin C is one of the most important water-soluble vitamins. It is responsible for many important functions in the body, including: it has a positive effect on maintaining immunity, protects the body against free radicals, and also participates in the synthesis of hormones. Juices can be a good source of this vitamin. Most of the juices available on the market are processed products. Untreated juices, which do not contain added preservatives, sugar and are not pasteurized, constitute a smaller group on the market. Therefore, this group of juices can be a valuable product in human nutrition. Objective. The aim of the study was to analyze the content of ascorbic acid (AA), dehydroascorbic acid (DHAA) and vitamin C (TAA) in non-preserved juices, depending on their type and storage time. Material and methods. The analysis of TAA, AA and DHAA content in juices was carried out in ten types of non- preserved juices from two companies (A and B), purchased in a chain of retail outlets. The analyzed juices in company A were: sauerkraut and carrot, grapefruit, orange, apple and mandarin, while in company B: orange, apple, apple and quince, grapefruit and mandarin. In test 1, the first ten juices were analyzed, in test 2 - another ten juices after one month, in test 3 - juices from test 2 were used, and three days after opening the package and storing the juices in standard refrigeration conditions, the stability test of AA was analyzed. The AA and TAA contents were determined using the high performance liquid chromatography (HPLC) method. The DHAA content was calculated by subtracting the AA content from the TAA content. Results. The highest TAA content was found in citrus juices, i.e. grapefruit, orange and mandarin, and the lowest in sauerkraut and carrot juices and apple juice. Moreover, ascorbic acid in apple juice was characterized by the lowest durability. Conclusions. In the production of non-preserved apple juice, consideration should be given to the natural protection of ascorbic acid by the addition of citrus or other fruit juice, vegetable juice or by using a mild technology in the production process.

Źródło:

Roczniki Państwowego Zakładu Higieny; 2021, 72, 4; 373-379
0035-7715

Pojawia się w:

Roczniki Państwowego Zakładu Higieny

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:

Chitosan dichloro acetic acid salts

Autorzy:

Wojtasz-Pająk, Anna

Powiązania:

https://bibliotekanauki.pl/articles/1035503.pdf

Data publikacji:

2010

Wydawca:

Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe

Tematy:

chitosan
dichloroacetic acid.

Opis:

The salts of dichloroacetic acid were obtained from chitosans of different deacetylation degrees (69÷97%) and viscosity-average molecular weights (61÷327 kDa). The mole ratio of dichloroacetic acid to amine groups was 1. The chemical and physical properties of the salts were evaluated by determining the dry weight, the content of ash, acid, insoluble substances, kinematic viscosity, and pH. The studied salts had a low contents of water (<10%), inorganic pollutants (<0.2%), and a low insoluble substances fraction (<0.15%). The determined acid content was similar to the theoretical content. The physical properties of the chitosan influenced the kinematic viscosity of the salt solutions. The kinematic viscosity decreased when the viscosity-average molecular weights of the chitosan decreased. The properties of chitosan did not significantly impact the pH of the salt solutions. This depended on the pKa of the acid. The chemical and physical properties of the salts can be altered by neutralizing the dichloroacetate solutions to a pH at which no distinct change in clarity occurs.

Źródło:

Progress on Chemistry and Application of Chitin and its Derivatives; 2010, 15; 55-62
1896-5644

Pojawia się w:

Progress on Chemistry and Application of Chitin and its Derivatives

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Possibilities of using propionic bacteria in the production of acetic acid from whey
Możliwości wykorzystania bakterii propionowych do produkcji kwasu octowego i serwatki

Autorzy:

Sobczak, E.
Konieczna, E.

Powiązania:

https://bibliotekanauki.pl/articles/1399048.pdf

Data publikacji:

1987

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

acetic acid
lactose
propionic bacteria
propionic acid
whey

Opis:

Acetic acid was obtained directly from lactose contained in whey with the use of microorganisms. A Propionibacterium strain was selected which converted about 90% of the lactose into acetic acid and 10% into propionic acid. Applying the presented method of lactose transformation into acetic acid by propionic fermentation it is possible to obtain about 60 kg of pure acetic acid from every 100 kg of lactose contained in whey.
Przeprowadzono badania mające na celu otrzymanie kwasu octowego bezpośrednio z laktozy zawartej w serwatce metodą mikrobiologiczną, prowadzoną z zastosowaniem wybranego szczepu bakterii z rodzaju Propionibacterium. W wyniku dokonanej selekcji spośród 11 szczepów bakterii priopionowych wybrano jeden należący do gatunku Propionibacterium freudenreichii subsp. shermanii T-112, który zastosowano w dalszej części doświadczeń. Szczep ten przekształcał laktozę zawartą w serwatce w ok. 90% w kwas octowy i w ok. 10% w kwas propionowy, co przedstawiono na rysunku. W kolejnym etapie przeprowadzono fermentację przy użyciu szczepu T-112 na podłożu serwatkowym. Proces przebiegał w warunkach beztlenowych w temp. 30°C w ciągu 5 dni. W ten sposób otrzymano płyn pofermentacyjny, z którego bezpośrednio w wyniku przeprowadzenia wielu operacji fizykochemicznych otrzymano kwas octowy (zaplanowany proces technologiczny sprawdzono najpierw na roztworach czystych - wzorcowych, tj. wodnych roztworach kwasu octowego i propionowego). Wytwarzane w czasie fermentacji kwasy lotne były wiązane w sole wapniowe (octan i propionian wapnia), co pozwoliło na ich wydzielenie z płynów pofermentacyjnych przez krystalizację. Kwas octowy uwolniony był z kryształów przez rozszczepienie jego soli po dodaniu stechiometrycznych ilości kwasu siarkowego. I tak uzyskany kwas octowy - ocet zawierał również kwas propionowy w ilości ok. 4%. Otrzymany kwas octowy poddano badaniom mającym na celu porównanie właściwości uzyskanego produktu z niektórymi wymaganiami, jakie stawia Polska Norma dla octu spirytusowego, a dane są przedstawione w tab. 2. Określono również wydajność procesu pozyskiwania kwasu octowego, biorąc pod uwagę przemianę cukrów zawartych w podłożu oraz odzysk kwasu octowego z płynów pofermentacyjnych, co zilustrowano w tab. 1. Otrzymane wyniki z tej pracy upoważniają nas do stwierdzenia, że metodą bezpośredniej przemiany (beztlenowej) z cukrów zawartych w serwatce można otrzymać kwas octowy spożywczy.

Źródło:

Acta Alimentaria Polonica; 1987, 13, 4; 351-358
0137-1495

Pojawia się w:

Acta Alimentaria Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Jiroft refractory manganese ore leaching using oxalic acid as reducing agent in sulfuric acid solution

Autorzy:

Sobouti, Arash
Shafaat, Niosha
Abdollahzadeh, Ali A.

Powiązania:

https://bibliotekanauki.pl/articles/110395.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

manganese
oxalic acid
sulfuric acid
leaching
optimization
Jiroft

Opis:

Leaching process of Jiroft refractory manganese ore was investigated. The effects of operating parameters such as liquid to solid ratio, pulp temperature, sulfuric acid concentration, and oxalic acid concentration were studied and the optimization was done through the response surface methodology (RSM) based on central composite design (CCD) model. The recoveries of Mn, Fe and Si were selected as response of design. The optimum condition was determined by ANOVA, indicating that the liquid to solid ratio, oxalic acid concentration and pulp temperature for Mn recovery and liquid to solid ratio, pulp temperature and sulfuric acid concentration for Fe recovery and liquid to solid ratio for Si recovery were the most effective parameters, respectively. Under the optimum conditions of liquid to solid ratio= 11.8%, pulp temperature= 70⁰ C, sulfuric acid concentration= 40 g/L and oxalic acid concentration= 35 g/L, 71.1%, 4.67% and 0.6% of Mn, Fe and Si were recovered, respectively.

Źródło:

Physicochemical Problems of Mineral Processing; 2020, 56, 2; 374-385
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

A novel Δ12-fatty acid desaturase gene from methylotrophic yeast Pichia pastoris GS115

Autorzy:

Wei, D
Li, M
Zhang, X
Zhou, H
Xing, L

Powiązania:

https://bibliotekanauki.pl/articles/1041169.pdf

Data publikacji:

2006

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

fatty acid desaturase gene
Pichia pastoris
Saccharomyces cerevisiae
linoleic acid

Opis:

The methylotrophic yeast Pichia pastoris GS115, a widely used strain in production of various heterologous proteins, especially membrane-bound enzymes, can also produce linoleic and linolenic acids, which indicates the existence of membrane-bound Δ12 and Δ15-fatty acid desaturases. This paper describes the cloning and functional characterization of a novel Δ12-fatty acid desaturase gene from this methylotrophic yeast. The open reading frame of the gene (named Pp-FAD12) is 1263 bp in size and encodes a 420-amino-acid peptide. The deduced Pp-FAD12 protein shows high identity (50-67%) with Δ12-fatty acid desaturases from other fungi. It also shows a high identity (57%) with Δ15-fatty acid desaturase (named Sk-FAD15) from Saccharomyces kluyveri. Expression of Pp-FAD12 in polyunsaturated fatty acids non-producing yeast Saccharomyces cerevisiae demonstrated that its product converted oleic acid (18 : 1) to linoleic acid (18 : 2). This result suggests that Pp-FAD12 encodes a novel Δ12-fatty acid desaturase in P. pastoris GS115. This is the first report about the cloning and functional characterization of Δ12-fatty acid desaturase gene in methylotrophic yeast.

Źródło:

Acta Biochimica Polonica; 2006, 53, 4; 753-759
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Synthesis and characterization of a citric and lipoic acids-derived dendrimer
Synteza i charakterystyka dendrymeru pochodzącego z kwasu cytrynowego i liponowego

Autorzy:

Salgado-Delgado, René
Salgado-Delgado, Areli M.
Olarte-Paredes, Alfredo
García-Fuentes, Juan J.
López-Lara, Teresa
Hernández-Zaragoza, Juan B.
García-Hernández, Edgar
Castaño, Víctor M.

Powiązania:

https://bibliotekanauki.pl/articles/2202634.pdf

Data publikacji:

2023

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej

Tematy:

dendrimer
citric acid
lipoic acid
dendrymer
kwas cytrynowy
kwas liponowy

Opis:

The paper describes the synthesis and characterization of two third generation dendrimers from citric acid and a variant with a dendron terminated with lipoic acid. FTIR and C NMR confirmed the presence of signals characteristic for the dendrimer functional groups OH, C-O, C=O, C-H and C-S. DSC showed that, unlike citric acid, the dendrimer is amorphous. SEM revealed changes in the structure of citric acid particles in each dendrimer generation. In addition, the structure was more homogeneous. Dendrimers are hydrophobic due to ester linkages. Contact angle > 90° confirms their hydrophobic char-acter. Moreover, the dendrimer with a dendron terminated with lipoic acid absorbs Cu+2 and Fe+3metal ions, so it can be used as an adsorbent for heavy metals.
W pracy opisano syntezę i charakterystykę dwóch dendrymerów trzeciej generacji z kwasu cytrynowego oraz wariantu z dendronem zakończonym kwasem liponowym. Metodą FTIR i C NMR potwierdzono sygnały charakterystyczne dla grup funkcyjnych dendrymeru OH, C-O, C=O, C-H i C-S. Metodą DSC wykazano, że w odróżnieniu od kwasu cytrynowego dendrymer jest amorficzny. Mikrofotografie SEM wykazały zmiany w strukturze cząstek kwasu cytrynowego w każdym pokoleniu dendrymeru. Ponadto struktura była bardziej jednorodna. Dzięki wiązaniom estrowym otrzymane dendrymery są hydrofobowe, co potwierdza kąt zwilżania > 90°. Wykazano również, że dendrymer z dendronem zakończonym kwasem liponowym absorbuje jony metali Cu+2 i Fe+3, dzięki czemu może być stosowany jako adsorbent metali ciężkich.

Źródło:

Polimery; 2023, 68, 1; 25--31
0032-2725

Pojawia się w:

Polimery

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

The Forming of Acid Mine Drainage Based on Characteristics of Coal Mining, East Kalimantan, Indonesia

Autorzy:

Widayati Amy, Sri
Dani, Umar
Nu'man, Harits
Muslim, Dicky
Nasruddin, Dudi
Nuryahya, Himawan
Nurhasan, Rully
Agustin, Daryl Sarah

Powiązania:

https://bibliotekanauki.pl/articles/27323828.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

coal
sulfur
acid mine drainage
NAPP
net acid production potential

Opis:

As one of the world’s coal producers, Indonesia continues to increase its coal production. The purpose of this study is to identify and analyze the characteristics of coal that has the potential to produce acid mine drainage. The research method is coal mapping and zoning based on formation, observation, and description of coal characteristics, coal sampling, ultimate and proximate testing, and analysis. The results of the study describe the characteristics of coal related to distribution in the early stages of evaluating the potential for acid mine formation, besides that it can be used as a basis for classifying the potential for acid mine drainage which has a high enough total sulfur based on the results of testing on 15 samples. To prevent the reaction to acid mine drainage, it can be based on the geochemical characteristics of coal by constructing a mine reservoir or making water drainage in a mine that is not close to the stockpile, because there is a possibility that water has the potential to form acid mine drainage (AMD) when it comes in contact with coal potential. So that coal does not have the potential to be a source of acid mine drainage.

Źródło:

Journal of Ecological Engineering; 2023, 24, 7; 301--310
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Free and bound phenolic acids in inflorescences and rhizomes with roots of Hieracium pilosella L. [Asteraceae]

Autorzy:

Gawronska-Grzywacz, M
Krzaczek, T.

Powiązania:

https://bibliotekanauki.pl/articles/58360.pdf

Data publikacji:

2006

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

free phenolic acid
bound phenolic acid
phenolic acid
inflorescence
rhizome
root
Hieracium pilosella
Compositae

Opis:

The analysis of the fractions of free and bound, liberated by hydrolysis, phenolic acids in the inflorescences and rhizomes with roots of Hieracium pilosella L. was conducted by 2D-TLC and RP-HPLC methods. In the inflorescences fourteen phenolic acids were found: chlorogenic, gallic, protocatechuic, homoprotocatechuic, caffeic, gentisic, p-hydroxyphenylacetic, p-hydroxybenzoic, m-hydroxybenzoic, p-coumaric, syringic, vanillic, ferulic and salicylic. In the rhizomes with roots nine phenolic acids were identified: chlorogenic, gallic, homoprotocatechuic, caffeic, gentisic, p- hydroxyphenylacetic, p-hydroxybenzoic, syringic and vanillic. By means of the RP-HPLC method the contents of major acids were estimated which ranged from 0.01 mg% up to 139.50 mg%. Caffeic acid is the remarkably dominating constituent of both plant materials. Phenolic compounds may contribute to invasiveness and medicinal properties of this species.

Źródło:

Acta Societatis Botanicorum Poloniae; 2006, 75, 3; 215-218
0001-6977
2083-9480

Pojawia się w:

Acta Societatis Botanicorum Poloniae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Trans-arachidonic acids: new mediators of inflammation

Autorzy:

Balazy, M.

Powiązania:

https://bibliotekanauki.pl/articles/69394.pdf

Data publikacji:

2000

Wydawca:

Polskie Towarzystwo Fizjologiczne

Tematy:

arachidonic acid
lipid
uric acid
protein
dairy fat
inflammation
fatty acid
free radical
DNA

Źródło:

Journal of Physiology and Pharmacology; 2000, 51, 4,1
0867-5910

Pojawia się w:

Journal of Physiology and Pharmacology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Markery DNA w hodowli jakosciowej rzepaku ozimego [Brassica napus L.] w aspekcie modyfikacji zawartosci kwasow tluszczowych

Autorzy:

Mikolajczyk, K
Bartkowiak-Broda, I.

Powiązania:

https://bibliotekanauki.pl/articles/834295.pdf

Data publikacji:

2003

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

regulatory
rosliny oleiste
kwas laurynowy
hodowla jakosciowa
kwas palmitynowy
enzymy
kwas erukowy
kwas stearynowy
rzepak ozimy
kwas oleinowy
markery DNA
kwas mirystynowy
kwasy tluszczowe
Brassica napus
kwas linolenowy
regulatory enzyme
oil plant
lauric acid
qualitative breeding
palmitic acid
enzyme
erucic acid
stearic acid
winter rape
oleic acid
DNA marker
myristic acid
fatty acid
linolenic acid

Źródło:

Rośliny Oleiste - Oilseed Crops; 2003, 24, 1; 33-49
1233-8273

Pojawia się w:

Rośliny Oleiste - Oilseed Crops

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

The effect of methyl jasmonate and phenolic acids on growth of seedlings and accumulation of anthocyanins in common buckwheat (Fagopyrum esculentum Moench)
Wpływ jasmonianu metylu i kwasów fenolowych na wzrost siewek i akumulację antocyjanów w gryce zwyczajnej (Fagopyrum esculentum Moench)

Autorzy:

Horbowicz, M.
Mioduszewska, H.
Koczkodaj, D.
Saniewski, M.

Powiązania:

https://bibliotekanauki.pl/articles/26862.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

methyl jasmonate
phenolic acid
plant growth
seedling
accumulation
anthocyanin
buckwheat
Fagopyrum esculentum
trans-cinnamic acid
p-coumaric acid
salicylic acid
naringenine

Opis:

The effect of methyl jasmonate (JA-Me) and phenolic acids: trans-cinnamic acid (t-CA), p-coumaric acid (p-CA), salicylic acid (SA) as well as naringenine (NAR) on growth of seedlings and accumulation of anthocyanins in common buckwheat (Fagopyrum esculentum Moench) were studied. JA-Me and phenolics were applied to growth medium of 4-days etiolated buckwheat seedlings before their exposition to day/night (16h/8h) conditions. The increase of primary roots and hypocotyls length were measured after 3 days of seedling growth in such conditions. At the end of experiment the total anthocyanins contents were measured as well. Methyl jasmonate (JA-Me) and trans-cinnamic acid (t-CA) inhibited growth of the primary root in young buckwheat seedlings, while naringenine (NAR) had a stimulatory influence, and p-coumaric acid had no effect at all. None of investigated phenolics or JA-Me had an effect on the growth of buckwheat hypocotyls, except the mixture of JA-Me and p-coumarcic acid. JA-Me significantly decreased the anthocyanins level in buckwheat hypocototyls, but not in cotyledons. trans-Cinnamic acid, p-coumaric acid and naringenine had no significant influence on the anthocyanin level in hypocotyls and cotyledons of buckwheat seedlings. Simultaneous treatment of buckwheat seedlings with JA-Me and t-CA or p-CA did not change the inhibition of anthocyanins accumulation in buckwheat hypocotyls by JA-Me. In the hypocotyls of buckwheat treated with a mixture of JA-Me and NAR, or SA, a synergistic reduction of anthocyanins was observed.
Badano wpływ jasmonianu metylu (JA-Me) i kwasów fenolowych: trans-cynamonowego (t-CA), p-kumarowego (p-CA), salicylowego (SA) oraz naryngeniny (NAR) na wzrost siewek i akumulację antocyjanów w gryce zwyczajnej (Fagopyrum esculentum Moench). JA-Me i związki fenolowe zastosowano na 4-dniowe siewki wyrosłe w ciemności przed ich wystawieniem na warunki dnia/nocy (16h/8h). Badano także przyrost długości korzeni głównych oraz hypokotyli po 3-dniowym okresie wegetacji w takich warunkach. Wówczas też oznaczono sumaryczne zawartości antocyjanów. JA-Me i t-CA hamowały, podczas gdy NAR stymulowała wzrost korzeni głównych, zaś p-CA nie miał wpływu na ich wzrost. Badane związki fenolowe i JA-Me nie wpływały na wzrost hipokotyli siewek gryki zwyczajnej, za wyjątkiem jednocześnie zastosowanych JA-Me i kwasu p-kumarowego, które działały hamująco. JA-Me istotnie obniżał poziom antocyjanów w hipokotylach gryki, ale nie wpływał na ich zawartość w liścieniach. Kwas trans-cynamonowy, p-kumarowy i naryngenina nie miały wpływu na zawartość antocyjanów w hypokotylach i liścieniach siewek gryki. Jednoczesne zastosowanie JA-Me i t-CA lub p-CA nie wpłynęło na akumulację, podczas gdy użycie JA-Me wraz NAR lub SA spowodowało synergistyczne obniżenie zawartości antocyjanów w hipokotylach siewek gryki zwyczajnej.

Źródło:

Acta Agrobotanica; 2009, 62, 1
0065-0951
2300-357X

Pojawia się w:

Acta Agrobotanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Changes in the content of γ-linolenic C18:3 (n-6) and stearidonic C18:4 (n-3) acids in developing seeds of vipers bugloss Echium vulgare L.

Autorzy:

Stolyhwo, Andrzej
Mol, Jolanta

Powiązania:

https://bibliotekanauki.pl/articles/1040860.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

octadecatetraenoic acid
γ-linolenic acid
lipids
Echium vulgare L.
Boraginaceae
seeds
stearidonic acid
viper's bugloss

Opis:

Changes in the composition of fatty acids (FA) were determined in lipid extracts isolated from developing ovaries containing ovules and developing seeds of Echium vulgare L. The samples were collected successively over 20 days beginning with the first day after flowering. The contents of the n-6 FA family members, i.e., γ-linolenic (GLA) (C18:3) and linoleic (LA) (C18:2) acids changed in a parallel manner and reached the maximum of 13.9% and 24%, respectively, on the 12th day, after which they fell systematically down to 8.6% and 18.2%, respectively, on the 20th day after flowering. Starting with day 13, the content of α-linolenic acid (ALA) (C18:3 n-3) begins to grow intensively, from 24.2% to 39.3% on the 20th day after flowering. The increase in the content of stearidonic acid (SDA) (C18:4 n-3), up to 10.5% on the 20th day after flowering, occurred steadily as the seeds developed, and was independent of the changes in the content of GLA and LA. The pattern of changes in the content of SDA, GLA, LA and ALA during the development of seeds, and the occurrence of SDA in the seed oil of other plants, demonstrate that the biosynthesis of SDA in the seeds is critically dependent on the presence of ALA. The above condition indicates that SDA biosynthesis in the seeds of Echium vulgare follows the scheme LA → simultaneous, competitive, action of Δ6 and Δ15 desaturases, leading to the formation of GLA and ALA, respectively, and then ALA (Δ6 des) → SDA. The biosynthesis according to the scheme: GLA (Δ15 des) → SDA is highly unlikely.

Źródło:

Acta Biochimica Polonica; 2007, 54, 4; 741-746
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Herbicidal efficacy of some natural products and mulching compared to herbicides for weed control in onion fields

Autorzy:

El-Metwally, I.
Shalaby, S.

Powiązania:

https://bibliotekanauki.pl/articles/2084820.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

acetic acid
Allium cepa
citric acid
onion
rice straw

Opis:

In two field experiments, the effect of some weed control treatments (citric acid at the rate of 10, 15 and 20%, acetic acid at the rate of 20, 30 and 40%, oxadiargyl, oxyflurfen, rice straw mulch, hand hoeing and an unweeded check control treatment) on weed growth and onion productivity in sandy soils at the Agricultural Experimental Station of the National Research Centre, Egypt was studied. The results indicated that all weeded treatments reduced the dry weight of broadleaf, grassy and total weeds as compared with the weedy check. Oxadiargyl, followed by two hand hoeing, rice straw mulch and acetic acid 40% recorded the greatest weed control efficiency. Insignificant differences were noticed between these treatments. Applying rice straw mulch increased bulb length, bulb diameter, bulb weight and onion yield by 67.52, 57.55, 45.74 and 66.22% over the weedy check, respectively. The highest values of N, P and K were obtained from rice straw mulch treatment followed by hand hoeing, oxadiargyl and acetic acid 40% treatments. It may be concluded that farmers can certainly depend on mulching or acetic acid at 40% instead of using chemical herbicides especially in organic farm systems for controlling onion weeds.

Źródło:

Journal of Plant Protection Research; 2019, 59, 4; 479-486
1427-4345

Pojawia się w:

Journal of Plant Protection Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Pyrite oxidation inhibition by hydrophobic films for acid mine drainage control at the source

Autorzy:

Wang, Shuncai
Zhao, Yue
Li, Shuang

Powiązania:

https://bibliotekanauki.pl/articles/110200.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

hydrophobic film
pyrite
suppression
linoleic acid
acid mine drainage

Opis:

Acid mine drainage (AMD), which is also known as acid rock drainage (ARD), can cause serious environmental pollution, especially for surrounding aquatic and terrestrial ecosystems due toits low pH, high metal and sulfate concentration. Acid mine drainage is an urgent environmental problem for the worldwide ore mining industry. In this paper, we demonstrated that hydrophobic films can inhibit the oxidation of pyrite-bearing tailings to achieve the control of at-source AMD. The results of chemical leaching testing showed that the hydrophobic films formed by linoleic acid can suppress the oxidation of pyrite-bearing tailings and reduce the AMD production. In addition, the presence of hydrophobic films of linoleic acid on the surface of pyrite-bearing tailings was confirmed by the results from Fourier transform infrared (FTIR) analyses and scanning electron microscopy with energy dispersive spectrometry (SEM / EDS).

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1132-1140
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Investigation of kinetics and mechanism of priceite leaching in sulphuric acid solutions

Autorzy:

Gur, A.

Powiązania:

https://bibliotekanauki.pl/articles/110631.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

boron minerals
priceite
sulphuric acid
leaching kinetics
boric acid

Opis:

The leaching kinetics and mechanism of priceite having the formula of 4CaO5B2O37H2O was investigated in sulphuric acid solutions. For the dissolution process, the effects of reaction temperature, sulphuric acid solution concentration, solid/liquid ratio, particle size, and stirring speed were investigated as effective parameters for the experiments. The experimental data indicated that the dissolution rate increased with the increasing reaction temperature, the decreasing particle size, and the solid/liquid ratio. The conversion rate increased up to 1.0 mol/dm3 with the increasing acid concentration, and then decreased with the increasing acid concentration over concentrations of 1 mol/dm3. It was also determined that the stirring speed had no significant effect on the dissolution rate. The dissolution process of priceite in sulphuric acid solution was tested with regard to heterogeneous and homogeneous reaction models, and it was found that the dissolution rate was controlled by first order pseudo-homogeneous reaction model. The activation energy of the dissolution process was determined as 26.07 kJmol-1. The results were evaluated graphically and statistically. The experimental data were found to fit well with the mathematical model.

Źródło:

Physicochemical Problems of Mineral Processing; 2015, 51, 2; 719-730
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Trace muscovite dissolution separation from vein quartz by elevated temperature and pressure acid leaching using sulphuric acid and ammonia chloride solutions

Autorzy:

Lin, M.
Pei, Z.-Y.
Lei, S.-M.
Liu, Y.-Y.
Xia, Z.-J.
Xie, F.-X.

Powiązania:

https://bibliotekanauki.pl/articles/110755.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

vein quartz
muscovite
sulphuric acid
ammonium chloride
acid leaching

Opis:

Effects of sulphuric acid and ammonia chloride on muscovite dissolution were studied in acid leaching of vein quartz under elevated temperature and pressure. The leaching processes have been studied in detail by analyzing sources of impurity minerals, optimizing leaching process, analyzing leaching kinetics of Al in muscovite and charactering leaching mechanism of muscovite. The results showed that elements of Al and K mainly occurred in muscovite, and 98.10% or more of muscovite could be removed by acid leaching, while the process had limited influence on the particle size of quartz sand. Leaching of Al in the quartz ore was mainly controlled by chemical reaction. A calcination process and ammonia chloride were used for reducing chemical reaction resistance by damaging crystal structure of muscovite and providing stable acid leaching environment. Combined with the calcination process, muscovite, as a main gangue mineral, was effectively extracted during acid leaching of vein quartz at elevated temperature and pressure.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 2; 448-458
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Acids in bitumen emulsions

Autorzy:

Solodkyy, S.
Sidun, I.
Vollis, O.

Powiązania:

https://bibliotekanauki.pl/articles/105437.pdf

Data publikacji:

2018

Wydawca:

Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza

Tematy:

bitumen emulsion
hydrochloric acid
orthophosphoric acid
slurry seal and microsurfacing mixtures

Opis:

In the article there is proved the possibility of using ortho-phosphoric acid with special emulsifiers instead of hydrochloric acid - for the production of road cationic slow-setting bitumen emulsions. There is ascertained the difference between used for bitumen emulsions distilled binder (Nybit E85 bitumen), produced from heavy crude oil, and oxidized bitumens (grade 70/100 bitumen produced by JSC Mozyr Refinery and grade BND 60/90 bitumen of JSC UkrTatNafta), produced from light crude oil. The difference is analyzed between physical-mechanical indices of distilled and oxidized bitumens. Eight bitumen emulsion formulations were developed based on usage hydrochloric acid, three bitumens and three emulsifiers (Redicote E-11, Redicote 404 and Redicote E-4875), as well as four formulations based on usage of ortho-phosphoric acid, two bitumens and two emulsifiers (Redicote EM44 and Redicote C-320). There was investigated the influence of hydrochloric and ortho-phosphoric acids upon the physical-technical indices of road cationic slow-setting bitumen emulsions and the difference was ascertained between the indices of bitumen emulsions based on distilled and oxidized bitumens. Bitumen emulsion formulations were developed based on usage of ortho-phosphoric acid and special emulsifiers for the class of cationic slow-setting emulsions for slurry seal and microsurfacing mixtures.

Źródło:

Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 3; 83-90
2300-5130
2300-8903

Pojawia się w:

Czasopismo Inżynierii Lądowej, Środowiska i Architektury

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Synthesis and properties of model humic substances derived from gallic acid

Autorzy:

Slawinska, D.
Polewski, K.
Rolewski, P.
Slawinski, J.

Powiązania:

https://bibliotekanauki.pl/articles/25730.pdf

Data publikacji:

2007

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

humic acid
humic substance
gallic acid
antioxidant
high performance liquid chromatography

Źródło:

International Agrophysics; 2007, 21, 2
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Therapeutic advantages of omega-3 fatty acid supplementation in patients with schizophrenia – a systematic review

Autorzy:

Vityala, Srilaxmi
Priya Kanteti, Krishna
Vityala, Yethindra
Tagaev, Tugolbai
Damineni, Ujwala

Powiązania:

https://bibliotekanauki.pl/articles/40499950.pdf

Data publikacji:

2024-03-30

Wydawca:

Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego

Tematy:

docosahexaenoic acid
eicosapentaenoic acid
omega-3 polyunsaturated fatty acids
schizophrenia
supplementation

Opis:

Introduction and aim. In patients with schizophrenia, omega-3 (n-3) polyunsaturated fatty acids (PUFAs) treatment was found to ameliorate the cardiovascular, metabolic, and inflammatory problems caused by antipsychotic medication and even reduce the need for medication by 20%. In this study, we evaluated the potential therapeutic effects of n-3 PUFA supplementation in patients with schizophrenia. Material and methods. The PRISMA guidelines were followed in conducting this systematic review. The Embase, MEDLINE, Web of Science, and Google Scholar databases were searched electronically. The first search yielded 50 papers in total. Subsequently, 43 publications that did not meet our eligibility requirements were removed, and seven articles were selected. Analysis of the literature. The analysis showed that n-3 PUFA supplementation and the placebo group both decreased their psychotic (PANSS and GAF scales) and Calgary Depression Scale symptomatology and boosted their functional ability (GAF) when used as an adjuvant to antipsychotic medication. When administered as a monotherapy with a metabolic antioxidant, n-3 PUFA supplementation proved beneficial for treating schizophrenia. In patients with schizophrenia, n-3 PUFAs have therapeutic benefits as adjuvant treatments to medications, although not for different variables or patient groups. Conclusion. In many studies, patients with chronic schizophrenia who received n-3 PUFA supplementation showed no improvement in their clinical condition.

Źródło:

European Journal of Clinical and Experimental Medicine; 2024, 22, 1; 172-178
2544-2406
2544-1361

Pojawia się w:

European Journal of Clinical and Experimental Medicine

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 43.

Tytuł:

Application of adsorption isotherms in evaluating the influence of humic acid and farmyard manure on phosphorous adsorption and desorption capacity of calcareous soil

Autorzy:

Jamal, Aftab
Muhammad, Dost
ur Rahman, Mujeeb
Jamal, Hifsa

Powiązania:

https://bibliotekanauki.pl/articles/1165501.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Adsorption
Humic acid
Isotherm

Opis:

The phosphorus adsorption capacity of soil in the presence and absence of HA and FYM was determined by adding 0, 10, 20, 40, 60, 120, 240 and 360 mg L-1 (initially applied P, IPA) to 5 g soils with and without HA (10 mg kg-1) and FYM (20 g kg-1). The soils along with respective phosphorus solution were taken in duplicates, were shaken on horizontal shaker for 30 hr continuously. The suspension were then filtered through whattman-42 and analyzed for P which represented the equilibrium P concentration (EPC). These soils were then applied another 45 mL distilled water and shaken for 24 hr for desorption study. The study revealed that the soils treated with P+FYM and P+HA significantly decreased the adsorption of Phosphorous at each level of IPA as compared with soil treated with P alone. Furthermore in case of alone P the higher Xad and Kd values attributed towards more P adsorption, at any levels of IPA than the soil which received HA and FYM treatments. Soils treated with P+FYM and P+HA indicated higher desorption of P as well at any IPA than the soil treated with P alone, confirmed that FYM and HA not only reduced P adsorption but also played a vital role in the release of P from soil surfaces into soil solution. Langmuir and Freundlich isotherms models were used in the study, however Freundlich model was found best fit in the present study. Such type of studies should be encouraged at field levels.

Źródło:

World Scientific News; 2018, 107; 136-149
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Acetylsalicylic acid in prevention of preeclampsia

Autorzy:

Bałabuszek, Kamil
Mroczek, Anna
Pawlicka, Marta
Radzka, Agnieszka
Bednarski, Jerzy

Powiązania:

https://bibliotekanauki.pl/articles/1177738.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Preeclampsia
acetylsalicylic acid
pregnancy

Opis:

Preeclampsia is a frequent and dangerous complication of pregnancy. It is a significant cause of death for the mother and baby. In the course of this disease, the blood flow in the placenta is impaired, what leads to foetus hypoxia. It is characterized by high blood pressure and frequently large amount of protein in urine. To describe whether acetylsalicylic acid is effective in prevention of preeclampsia. Standard up-to-date criteria were followed for review of the literature data. A search for English-language articles in PubMed database was performed. Papers published in 2017 were reviewed. In double-blind trial published in 2017 in The New England Journal of Medicine researchers divided women who were at high risk for preeclampsia into two groups. One group was receiving acetylsalicylic acid and other was receiving placebo. Preeclampsia was observed in 1.6% participants in the acetylsalicylic acid group, compared with 4.3% in the placebo group. From other study we found out that acetylsalicylic acid has a dose-response effect. Greater reduction in the risk of preeclampsia was reported with the acetylsalicylic acid dosage >75 mg/d. When acetylsalicylic acid was included in treatment at >16 weeks, there was less reduction of preeclampsia without relationship with acetylsalicylic acid dosage. Other meta-analysis shows that there was no statistically significant difference in occurrence of preeclampsia between women who started taking acetylsalicylic acid before and after 16th week of pregnancy. Acetylsalicylic acid is a good agent to prevent of preeclampsia. It should be prescribed to women in high risk groups regardless of the duration of pregnancy even though it may not reduce the risk of preeclampsia as much as before 16th week of gestation.

Źródło:

World Scientific News; 2018, 101; 229-236
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Adsorption Behavior of Glucuronic Acid on Pyrite Surface: an electrochemical and DFT Study

Autorzy:

Ning, Xu Jia
Ying, Yang Hong
Lin, Tong-Lin

Powiązania:

https://bibliotekanauki.pl/articles/355049.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

glucuronic acid
pyrite
adsorption

Opis:

Bacterial adsorption on mineral surface is one of the key steps in bioleaching process. The bacteria adsorb on the mineral surface via the extracellular polymeric substances (EPS) layer. In this paper, the behavior of glucuronic acid, one of the key substances in EPS layer, adsorbed on the pyrite surface is studied using DFT and electrochemical methods. Adsorption capacity of glucuronic acid is stronger than that of water. Glucuronic acid adsorbs on pyrite surfaces and it follows a mixed type of interactions (physisorption and chemisorption). Adsorption of glucuronic acid on pyrite surface followed Langmuir’s adsorption isotherm with adsorption standard free energy of –27.67kJ mol^-1. The structural and electronic parameters were calculated and discussed.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 1; 433-440
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 46.

Tytuł:

Physicochemiacal changes of post-frying sunflower oil

Autorzy:

Maniak, B
Szmigielski, M.
Piekarski, W.
Markowska, A.

Powiązania:

https://bibliotekanauki.pl/articles/26259.pdf

Data publikacji:

2009

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

physicochemical change
post-frying oil
sunflower oil
fatty acid composition
acid value zob.acid number
acid number
peroxide value zob.peroxide number
peroxide number
fuel biocomponent

Źródło:

International Agrophysics; 2009, 23, 3; 243-248
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

Genetic resources of flax (Linum usitatissimum L.) as very rich source of alpha-linolenic acid
Zasoby genowe lnu (Linum usitatissimum L.) jako bardzo bogate źródło kwasu alfa-linolenowego

Autorzy:

Silska, G.

Powiązania:

https://bibliotekanauki.pl/articles/71602.pdf

Data publikacji:

2017

Wydawca:

Instytut Włókien Naturalnych i Roślin Zielarskich

Tematy:

genetic resource
flax
Linum usitatissimum
alpha-linolenic acid
fatty acid
flax seed
omega-3 fatty acid

Opis:

Introduction: Polish oilseed and flaxseed collection is a source of genotypes containing very high amounts of α-linolenic acid. Objective: The objective of the study is to test the seeds for the fat content and fatty acids composition in the oil pressed from the 9 tested accessions of flax (Linum usitatissimum L.). Our goal is to promote the Polish flax collection, which seeds are unique as one of the richest sources of α-linolenic acid. Methods: Assays to determine the content of fat and fatty acids composition in linseed oil were performed at the IHAR-PIB Biochemical Laboratory in Poznań. The fat content was determined by infrared analysis (calibration performed on the basis of seed sample at IHAR-PIB in Poznań) by means of a NIRS 6500 spectrophotometer with a reflection detector within the range of 400–2500 nm. The composition of fatty acids was determined by means of a method proposed by Byczyńska and Krzymański (1969), based on gas chromatography of methyl esters of fatty acids contained in linseed oil. The following varieties of flax were investigated: Tabare (INF00111), Szegedi 30 (INF00427), Olin (INF 00444), Redwood 65 (INF00523), Dufferin (INF00540), AC Mc Duff (INF00648), Alfonso Inta (INF00683), Olinette (INF00687), Royale (INF00689). Results: The content of α-linolenic acid (ALA, C18:3) in evaluated genotypes of flax ranged from 48.9 (Royale) to 59.9% (Alfonso Inta). Content of linoleic acid (LA, C18:2) in evaluated genotypes of flax ranged from 12.4 (Tabare) to 17.1% (AC Mc Duff). The content of oleic acid (OA, C18:1) of 9 accession of flax ranged from 17.1 (Alfonso Inta) to 26.7% (Royale). The content of stearic acid in evaluated genotypes of flax ranged from 2.3 (Alfonso Inta) to 5.0% (Tabare, Szegedi 30) and the content of palmitic acid ranged from 4.7 (Dufferin) to 6.0% (Olin). The content of fat ranged from 42.7 (Olin) to 52.0% (AC Mc Duff). The fatty acid ratio n-6/n-3 ranged from 0.23/1 (Tabare) to 0.32/1 (AC Mc Duff).
Wstęp: Polska kolekcja lnu oleistego i włóknistego jest źródłem genotypów o bardzo wysokiej zawartości kwasu α-linolenowego. Cel: Przedmiotem badań było określenie zawartości oleju tłustego oraz składu kwasów tłuszczowych w wytłoczonym oleju z 9 testowanych obiektów lnu zwyczajnego (Linum usitatissimum L.). Naszym celem jest promocja polskiej kolekcji lnu, której nasiona są unikalne jako jedne z najbogatszych źródeł kwasu α-linolenowego. Metody: Oznaczenia zawartości oleju tłustego i składu kwasów tłuszczowych wykonano w Laboratorium Biochemicznym IHAR-PIB w Poznaniu. Zawartość oleju tłustego oznaczono analizą bliskiej podczerwieni (kalibracja wykonana na bazie prób nasion w IHAR-PIB w Poznaniu) spektrofotometrem NIRS 6500 z detektorem odbicia 400–2500 nm. Skład kwasów tłuszczowych oznaczono metodą opracowaną przez Byczyńską i Krzymańskiego (1969), z wykorzystaniem chromatografii gazowej estrów metylowych kwasów tłuszczowych zawartych w oleju z nasion lnu. Badania obejmowały następujące odmiany lnu zwyczajnego: Tabare (INF00111), Szegedi 30 (INF00427), Olin (INF 00444), Redwood 65 (INF00523), Dufferin (INF00540), AC Mc Duff (INF00648), Alfonso Inta (INF00683), Olinette (INF00687), Royale (INF00689). Wyniki: Zawartość kwasu α-linolenowego (ALA, C18:3) badanych genotypów lnu wynosiła od 48,9 (Royale) do 59,9% (Alfonso Inta). Zawartość kwasu linolowego (LA, C18:2) badanych genotypów lnu wynosiła od 12,4 (Tabare) do 17,1% (AC Mc Duff). Zawartość kwasu oleinowego (OA, C18:1) 9 badanych genotypów lnu wynosiła od 17,1 (Alfonso Inta) do 26,7% (Royale). Zawartość kwasu stearynowego badanych genotypów lnu wynosiła od 2,3 (Alfonso Inta) do 5,0% ( Royale) i zawartość kwasu palmitynowego wynosiła od 4,7 (Dufferin) do 6,0% (Olin). Zawartość tłuszczu wynosiła od 42,7 (Olin) do 52,0% (AC Mc Duff). Stosunek n-6/n-3 wynosił od 0,23/1 (Tabare) do 0,32/1 (AC Mc Duff).

Źródło:

Herba Polonica; 2017, 63, 4
0018-0599

Pojawia się w:

Herba Polonica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Biochemical activity of auxins in dependence of their structures in Wolffia arrhiza [L.] Wimm.

Autorzy:

Czerpak, R
Piotrowska, A.
Krotke, A.

Powiązania:

https://bibliotekanauki.pl/articles/57489.pdf

Data publikacji:

2004

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

chlorophyll b
auxin
nucleic acid
rootless wolfia
reducing sugar
carotenoid
indole-3-acetic acid
chlorophyll a
botany
Wolffia arrhiza
protein
phenylacetic acid
total carotenoid
2-naphthaleneacetic acid

Opis:

Wolffia arrhiza (L.) Wimm. (Lemnaceae) as a mixotrophic plant reacts considerably weaker to used auxins with different chemical structures than typical photosynthetic vascular plants and algae especially from Chlorophyta. Among used auxin compounds, the highest stimulative activity on W. arrhiza growth and biochemical parameters which were analysed in biomass, can be attributed to phenylacetic acid (PAA), a somewhat smaller to indole-3-acetic acid (IAA) and the smallest to 2-naphthaleneacetic acid (NAA) used in optimal concentration of 10-6 M, in comparison with the control culture, devoid of exogenous auxins. The investigated auxins, especially PAA and IAA, were found to have the most powerful stimulative activity (prevailingly between the 10th and the 15th day of cultivation) on the content of reducing sugars between 127 and 169%, chlorophyll a and b from 117 to 125%, total carotenoids from 115 to 132% and net photosynthetic rate from 127 to 144% in comparison with the control culture, which was treated as 100% for reference. However, the content of water-soluble proteins as well as nucleic acids (DNA and RNA) in the biomass of W. arrhiza was less effectively stimulated, hardly from 110 to 116% when compared to the control culture (100%).

Źródło:

Acta Societatis Botanicorum Poloniae; 2004, 73, 4
0001-6977
2083-9480

Pojawia się w:

Acta Societatis Botanicorum Poloniae

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Formulation and Stability of Cellulose Particles Enriched with Phenolic Acids

Autorzy:

Kopjar, Mirela
Vukoja, Josipa
Buljeta, Ivana
Ćorković, Ina
Pichler, Anita
Šimunović, Josip

Powiązania:

https://bibliotekanauki.pl/articles/24024620.pdf

Data publikacji:

2023-11-06

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

cellulose
gallic acid
caffeic acid
storage stability
antioxidant potential
complexation

Opis:

Dietary fibers and phenolic acids are recognized for their various health benefits; thus, cellulose was selected as a carrier polymer of phenolic acids, including gallic acid and caffeic acid. Dried cellulose particles were prepared through the complexation of different amounts of cellulose (2.5, 5, 7.5 and 10%, w/v) with a constant amount of phenolic acids. Additionally, the complexation time was 15 or 60 min with the goal to determine an impact of the duration of complexation on the adsorption of phenolic acids onto cellulose. The prepared particles were stored at ambient temperature for 12 months to assess their storage stability. Cellulose particles were assessed for the amount of adsorbed phenolic acids and antioxidant activities. For both phenolic acids, the same correlation was established, i.e., reduction of adsorption of phenolic acids occurred with the increase of cellulose amount during complexation. The duration of complexation was not a significant factor in the adsorption of phenolic acids. Antioxidant activity generally followed the trend that was obtained for the amount of adsorbed phenolic acids. Comparing both phenolic acids, cellulose had a higher affinity for caffeic acid (4.665 g/kg) than for gallic acid (3.399 g/kg). However, greater stability of gallic acid/cellulose particles was observed throughout the storage. After storage, the content of gallic acid in cellulose particles slightly decreased (up to 3%), while that of caffeic acid decreased from 10 to 20%. The complexation of phenolic acids with cellulose was proven by recording infrared spectra. Formulated cellulose particles can be a valuable tool for the preparation of plant-based functional additives which can be used for the enrichment of products with phenolic acids in order to improve their antioxidant potential and stability.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2023, 73, 4; 322-331
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Zastosowanie biostymulatorów w hodowli i ochronie sadzonek dębu szypułkowego (Quercus robur L.) w gruntowej szkółce leśnej
Application of biostimulators in the growth and protection of pedunculated oak (Quercus robur L.) seedlings in bare-root nursery

Autorzy:

Buraczyk, W.
Żybura, H.
Ostaszewska, E.
Studnicki, M.
Aleksandrowicz-Trzcińska, M.

Powiązania:

https://bibliotekanauki.pl/articles/979060.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

plant biostimulants
chitosan
humic acid
fulvic acid
silicon
pedunculate oak

Opis:

Pedunculate oak is a species of major economic importance in Polish forests. This species seedlings constitute 18.9% of the nursery production in the country. One of the most widespread fungal disease these oaks face is the oak powdery mildew induced by Erysiphe alphitoides. Nursery production is on the lookout for environment−friendly means of plant protection as well as growth simulators capable of raising levels of productivity. Our objectives was to assess two preparation treatments regarded as biostimulators (registered as fertilisers under the names Apol−Humus and Apol−Hum Chelat) in the raising of seedlings of pedunculate oak in bare−root nursery conditions. The experiment included 6 variants with seedlings treated with the above agents, protected against mildew in the traditional way using Falcon 460 EC, treated with fertiliser and fungicide at the same time, or left as control specimens with no measures taken. All preparations were applied by means of foliar spraying 5 times in the course of the season. Survival of seedlings was then assessed at the season end, along with biometric features like root−collar diameter, length of main root and stem, dry mass of leaves and stem, and degree of oak powdery mildew attack. Results indicated curtailment of mildew infection of oak seedlings thanks to both of the biostimulators, albeit to a more limited extent than when fungicide was applied. No stimulation of seedling growth was achieved, however, though the most favourable biometric parameters characterised the oaks supplied with both biostimulator and fungicide. Significantly higher survival rate was noted for oaks offered effective protection against mildew, in the variants with the fungicide or with simultaneous application of Apol−Humus or Apol−Hum Chelat with Falcon. The research points to the two biostimulators under study (based on natural components) being suitable for use in the nursery production of pedunculate oak seedlings, with it being presumed that either or both can allow for reduction in amount of fungicide necessary to be used to safeguard seedlings against mildew.

Źródło:

Sylwan; 2020, 164, 04; 292-299
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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