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Tytuł:
Effect of maximum interaction of circularly polarized electromagnetic waves with the molecule of DNA
Autorzy:
Balmakov, A. P.
Semchenko, I. V.
Khakhomov, S. A.
Powiązania:
https://bibliotekanauki.pl/articles/385080.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
DNA
helix
polarization selectivity
Opis:
Investigation of polarizing properties of DNA is chosen as one of primary importance due to mirror asymmetry of the shape of DNA. Preliminary theoretical calculation has shown that the form of DNA is optimum for radiation of a circular electromagnetic wave under the resonance condition (~10 nm). This conclusion has been proved for the metal DNA-like helices in a microwave range in accordance with the principle of scaling. In the given work it is experimentally confirmed the presence of the effect of polarization selectivity in double reflection of microwave waves from DNA-like helical elements depending on their sign (the right-handed and left-handed helices). It is shown that the circular polarization of waves plays an important role in case of interaction of microwaves reflected from the artificial DNA-like structures. Probably, the identical effect takes place in some processes that involve DNA in biological organisms' cells, but in the range of far ultraviolet radiation and the "soft" X-ray range. These results are also interesting in connection with an opportunity of creation of artificial 2D and 3D structures on the basis of branches of a molecule of DNA. Such structures can be into a basis of new type metamaterials.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 207-209
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ion-imprinted polymers: synthesis, characterization and applications
Autorzy:
Cejner, Marzena
Dobrowolski, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/763997.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Ion-imprinted polymers
Imprinting
Selectivity
Template
Opis:
Ion-imprinted polymers (IIPs) are created based on enzyme phenomenon, where these polymers exhibit selective recognition of metal ions in the presence of matrix ions. For that reason IIPs find many applications in sensors, solid phase extraction and membrane separation of metal ions. This review focuses on the synthesis, characterization and application of IIPs.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2015, 70, 2
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ środków ochrony roślin oraz bioregulatorów na liczebność drapieżnego roztocza dobroczynka gruszowca Typhlodromus pyri (Phytoseiidae)
Influence of pesticides and bioregulators on the number of predatory mite Typhlodromus pyri (Phytoseiidae)
Autorzy:
Sekrecka, M.
Powiązania:
https://bibliotekanauki.pl/articles/2119574.pdf
Data publikacji:
2019
Wydawca:
Instytut Ogrodnictwa
Tematy:
pesticides
bioregulators
selectivity
Typhlodromus pyri
Phytoseiidae
Opis:
The selectivity of some pesticides and bioregulators to the predatory mite Typhlodromus pyri (Phytoseiidae) was evaluated under laboratory and field conditions. Most of the tested preparations were classified as selective for T. pyri. This group includes fungicides: Tercel 16 WG (dithianon + pyraclostrobin), Flint Plus 64 WG (captan + trifloxystrobin), Signum 33 WG (boscalid + pyraclostrobin), Switch 62.5 WG (cyprodinil + fludioxonil), Captan 80 WG (captan), Topsin 500 SC (thiophanate-methyl), insecticides: Coragen 200 SC (chlorantraniliprole), Movento 100 SC (spirotetramat), Teppeki 50 WG (flonicamid), Agricolle (concentrated polysaccharide suspension), acaricides: Envidor 240 SC (spirodiclofen), Zoom 110 SC (etoxazole), bioregulator Asahi SL (sodium salts of 5-nitroguaiacolate as well as ortho- and paranitrophenolates), Regalis 10 WG (prohexadione-calcium) and herbicide Roundup 360 SL (glyphosate). A slightly higher mortality rate of predatory mites was found after the application of fungicides Kaptan Plus 71,5 WP (captan + triadimenol) and Frupica 440 EC (mepanipyrim). Fungicides: Dithane NeoTec 75 WG (mancozeb), Faban 500 SC (dithianon + pyrimethanil), Polyram 70 WG (metiram), insecticide Calypso 480 SC (thiacloprid) were classified as partially selective for phytoseiids. The insecticides Decis Mega 50 EW (deltamethrin), Acaramic 018 EC (abamectin) and the herbicide Basta 150 SL (glufosinate-ammonium) were highly toxic to the predatory mite T. pyri.
Źródło:
Zeszyty Naukowe Instytutu Ogrodnictwa; 2019, 27; 41-52
2300-5882
2391-8969
Pojawia się w:
Zeszyty Naukowe Instytutu Ogrodnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of chemical and biological leaching of sulfide tailings
Autorzy:
Aromaa, J.
Makinen, J.
Vepsalainen, H.
Kaartinen, T.
Wahlstrom, M.
Forsen, O.
Powiązania:
https://bibliotekanauki.pl/articles/110381.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sulfide tailings
chemical leaching
bioleaching
selectivity
Opis:
Sulphidic tailings from Finnish Hitura nickel mine and Pyhäsalmi multi-metal mine were leached using sulphuric acid and bioleached. The aim was to recover minor amounts of valuable Cu, Ni, Zn and Mn. Both tailings consisted mainly of iron and magnesium-containing minerals and acid neutralizing minerals. The solution after chemical leaching tests contained mostly iron and magnesium, in Hitura up to 11 g/dm3 Fe and 38 g/dm3 Mg while in Pyhäsalmi 8–9 g/dm3 Fe and 4 g/dm3 Mg. Amount of these metals was 20–100-fold larger than amount of valuable metals, which were typically 100-300 mg/dm3. Problems in chemical leaching were high consumption of acid and poor selectivity. Bioleaching using iron and sulphur oxidizing bacteria was more selective towards the valuable metals. Both in leaching and bioleaching the high concentration of iron and magnesium in solution will make metals recovery challenging.
Źródło:
Physicochemical Problems of Mineral Processing; 2013, 49, 2; 607-620
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Revisiting flotation mechanisms of the selective separation of alkali feldspars in the presence of NaCl
Autorzy:
Karagüzel, Cengiz
Çelik, Mehmet Sabri
Powiązania:
https://bibliotekanauki.pl/articles/2146922.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
feldspar
flotation
sodium chloride
selectivity
mechanizm
Opis:
Selective separation of Na-feldspar (NaAl3SiO8) from K-feldspar (KAl3SiO8) by flotation appears to be the only alternative in commonly found mixed-type ore formations. For this purpose, various mechanisms in various studies have been proposed by which selective separation can be achieved in the presence of salt ions. These mechanisms under different flotation conditions are systematically discussed in this study. Literature review reveals that two adsorption mechanisms are operating in the presence of Na+ ions and natural pH: Ion exchange and ion adsorption. In mixed feldspar systems, the mineral surface properties change due to ion exchange of counter ions on K-feldspar surface and become suitable for amine adsorption, while Na-feldspar surface is suppressed due to co-ion adsorption leading to limited amine adsorption. Similar mechanisms occur in acidic conditions with fluorine ions which increases the dispersion of particles and provides selectivity for K-feldspar by forming AlSiF-amine complexes. K-feldspar at alkaline pH with NaOH is activated with fluorine ions at the previous flotation stages and then floated with amine releasing K ions into the solution. The ion exchange/ion adsorption mechanism seems effective in alkaline as well as in natural and acidic conditions.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 5; art. no. 149928
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PHARMACOLOGICAL EVALUATION OF PYRROLIDINES AS POTENT ! 1 - ADRENERGIC RECEPTOR ANTAGONIST WITH URO-SELECTIVE PROFILE
Autorzy:
Sapa, Jacek
Bednarski, Marek
Nowiński, Leszek
Kotańska, Magdalena
Knutelska, Joanna
Zaręba, Paulina
LECHOCKA-NOWAK, Anna
BELCZYK, Małgorzata
ZYGMUNT, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/956844.pdf
Data publikacji:
2018
Wydawca:
Zakład Opieki Zdrowotnej Ośrodek Umea Shinoda-Kuracejo
Tematy:
α1A/B receptor selectivity
Opis:
Continuing our efforts in developing potent α 1 -adrenoceptor antagonists with uroselective profile, a series of derivatives of pyrrolidines was biologically evaluated in vitro for their affinity for α 1 - and α 2 -adrenoceptors. Result from binding assays allowed the identification of compounds with the highest affinity and selectivity for α 1 -adrenoceptors behaving as potent antagonists at those sites in cellular functional assays. Among tested derivatives, compound V [1-(3-(4-(3- chlorophenyl)piperazin-1-yl)propyl)pyrrolidin-2-one], displayed a 152-fold functional preference to α 1A -adrenoceptor versus α 1B subtype. Finally, the most promising compound V at the doses of 2, 5 and 10 mg/kg after i.v. administered, in contrast to tamsulosin (at a dose of 2 mg/kg, i.v.) did not significantly decrease systolic and diastolic blood pressure in normotensive anesthetized rats. This selected α 1A -adrenoceptor antagonist with stronger uroselective profile, requires further research.
Źródło:
Medicina Internacia Revuo; 2018, 28, 110; 23-34
0465-5435
Pojawia się w:
Medicina Internacia Revuo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selective chromium III/VI separation in polymer inclusion membrane system
Autorzy:
Rajewski, J.
Religa, P.
Wojasiński, M.
Gierycz, P.
Powiązania:
https://bibliotekanauki.pl/articles/115544.pdf
Data publikacji:
2014
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
chromium separation
selectivity
D2EHPA
PIM
Opis:
Analyze of chromium(III) transport process from mixtures of Cr(III)/Cr(VI) ions with polymer inclusion membrane (PIM) system have been done. Di(2-ethylhexyl) phosphoric acid (D2EHPA) have been used as a carrier. It was found that the transport efficiency in PIM is dependent on the carrier concentration in the membrane. It was found that there is an optimal range of carrier concentration in the membrane, which ensures rapid and efficient transport. In studied system optimal D2EHPA concentration was in range between 0,9- 1,5 mol/dm3. Membrane worked as selective barrier for Cr(VI) ions. However increase of Cr(VI) concentration above 0,0005 mol/dm3 negatively influenced Cr(III) transport. It was caused by degradation of the polymer inclusion membrane made of cellulose triacetate (CTA) . Strongly oxidizing Cr(VI) ions can damage polymer inclusion membrane with CTA matrix. The chemical attack of strongly oxidant Cr(VI) ions could lead either to hydrolysis of the pendant acetyl group or to oxidation of polymer backbone leading to chain scission. Moreover, oxidation is accelerated at high concentration of Cr(VI) ions. The membrane containing D2EHPA as a carrier can be recommended for selective separation of Cr(III) ions only from diluted Cr(VI)/Cr(III) mixtures. However the polymer inclusion membrane need a change the polymer matrix.
Źródło:
Challenges of Modern Technology; 2014, 5, 1; 15-19
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accuracy of separation parameters resulting from errors of chemical analysis, experimental results and data approximation
Autorzy:
Foszcz, D.
Duchnowska, M.
Niedoba, T.
Tumidajski, T.
Powiązania:
https://bibliotekanauki.pl/articles/109371.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
upgrading curve
approximation
copper ore
flotation
selectivity
Opis:
Accuracy of determination of different separation parameters and selectivity indicators depends on the error of chemical analysis of feed and separation products as well as experimental and approximation errors. In this paper different selectivity parameters were considered which formulae was based on the content of useful component in the feed, concentrate and tailing. It was shown that the impact of chemical analysis on the selectivity parameters was small and the error determined by means of partial derivative approach for a copper ore upgraded by flotation was negligible. Also experimental errors were found to be insignificant. The largest errors occurred for approximation of the upgrading data with inadequately selected selectivity indicators.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 1; 98-111
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silver(I) recovery on thiomorpholine - modified functional polymer
Autorzy:
Pilśniak-Rabiega, Magdalena
Wolska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2175444.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
synthesis
microwave modification
sorption
chloride solutions
selectivity
Opis:
The functional polymer containing heterocyclic ligands was synthesized by microwave modification of a crosslinked poly(vinylbenzyl chloride–divinylbenzene) matrix with thiomorpholine. The modification yield was 89.3%. The sorbent was used to recover Ag(I) from the synthetic and real chloride solutions. The maximum sorption capacity of Ag(I) was approximately 180 mg Ag/g. The sorption kinetic data were well-fitted to the pseudo-first-order kinetic model. The degree of silver desorption was approximately 50.0% using a 1.0% potassium cyanide solution in a 0.50% hydrogen peroxide solution. The resin retained its capacity toward Ag(I) in five consecutive sorption/desorption cycles. The thiomorpholine modified resin was highly selective toward Ag(I) in relation to Cu(II), Pb(II), Co(II), Ni(II), and Zn(II) from the real chloride leaching solution.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 156609
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A near-infrared fluorescent probe for selective detection of fluorion
Autorzy:
Kang, Yan-Fei
Wei, Fan
Meng, Ya-Li
Xin, Zhen-Hui
Wei, Dong
Powiązania:
https://bibliotekanauki.pl/articles/778367.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Probe
Fluorescence
Fluoride anion
Selectivity
Near-infrared
Opis:
In this work, we have designed and synthesized the fluorescent probe 1, which was capable to selectively detect fluoride anion (F−). More importantly, the probe 1 possessed near-infrared excitation and emission wavelengths (excitation at 650 nm and emission at 695), and the probe solution had changed dramatically from yellow to cyan with the addition of F–. In addition, the fluorescence intensity exhibited perfectly positive correlation with concentration of F− concentration from 0 to 40 μM (R2 = 0.9972), which offered the important condition for quantitative analysis. The probe 1 owned detection limit of 46 nM. Therefore, this near-infrared probe can be of great benefit for detecting F− in practical application.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 1; 1-5
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silver(I) recovery on sulfur-containing polymeric sorbents from chloride solutions
Autorzy:
Pilśniak-Rabiega, Magdalena
Wolska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1450545.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
functional polymers
synthesis
silver(I)
sorption
selectivity
Opis:
This work describes the preparation of functional polymers containing 2-mercapto-1-methylimidazole and guanylthiourea ligands from chemically modified vinylbenzyl chloride/divinylbenzene copolymer (VBC/DVB). The resins were used for the removal of Ag(I) from synthetic and real chloride solutions. The 2-mercapto-1-methylimidazole resin was highly selective towards Ag(I) in relation to Pb(II) from real chloride leaching solution. The resins were selective for Ag(I) from real chloride solution and they did not sorb chloride complexes of Co(II), Ni(II) and Zn(II). The sorption kinetic data were well fitted to the pseudo-first-order kinetic model. The degree of Ag(I) desorption was about 80% using 1% potassium cyanide solution in 0.5% hydrogen peroxide solution. Resins retain their capacity towards Ag(I) in five consecutive sorption/desorption cycles.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 290-310
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Box Selectivity in Different Container Cargo-handling Systems
Autorzy:
Kuznetsov, A. L.
Kirichenko, A. L.
Semenov, A. D.
Powiązania:
https://bibliotekanauki.pl/articles/116336.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
cargo handling
box selectivity
cargo handling system
container
container cargo-handling system
simulation model
theoretical selectivity
artificial intelligence
Opis:
The box selectivity in operational stack of container terminal is a quite common and long studied question. The pure random choice is governed by the theory of probability offering some combinatorial estimations. The introduction of operational rules like import/export separation, storage by shipping lines, sorting by rail or truck transportation etc., as well as the most notorious ‘sinking’ effect, i.e. covering of boxes arrived earlier by next cargo parties – all these blur the clear algebraiс picture and lead to appearance of many heuristic outlooks of the problem. A new impetus to this problem in last decades was given by the rapid development of IT, AI and simulation techniques. There are quite many examples of the models described in the scientific publication reflecting many real and arbitrary terminals, which embed very advanced and complicated mechanisms reflecting selected features and strategies. Unfortunately, these models usually are created ad hoc, with some pragmatic objectives and under the demand of closest possible proximity to the simulating objects. There are much less models designated to pure scientific study of the deep inner mechanisms responsible for the primal behavior of the operating container stack, enabling to introduce step by step new rules and restrictions, providing regular proving of every next stage’s adequacy and easy to use. This paper describes one attempt of this kind to create a new theoretical tool to put into the regular toolkit of the container terminal designer. The study starts with mathematical (combinatorial) considerations, proceeds with some restrictions caused by physical and technological characteristics, and ends up with the simulation model, which adequacy is confirmed by practical results.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 797-801
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ jakości nadawy na jakość produktów wzbogacania ocenianych za pomocą wykresu Fuerstenaua dla przypadku symetrycznej krzywej separacji
Influence of feed quality on quality of separation products evaluated by means of the fuerstenau plot for symmetrical separation curves
Autorzy:
Duchnowska, M.
Drzymała, J.
Powiązania:
https://bibliotekanauki.pl/articles/216515.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
wzbogacanie
separacja
selektywność
flotacja
upgrading
separation
selectivity
flotation
Opis:
Jeżeli wyniki wzbogacania dają się opisać na tzw. wykresie Fuerstenaua krzywą opisywaną równaniem matematycznym z jednym dopasowywanym parametrem, wtedy parametr ten może być wykorzystany jako wskaźnik selektywności wzbogacania. Jeżeli równanie to ma postać [...] (gdzie \epsilon oznacza uzysk składnika użytecznego w koncentracie, a [...] uzysk nieużytecznego składnika w odpadzie), wtedy przy stałej selektywności wzbogacania (stałe a) wzrost zawartości składnika użytecznego w nadawie \alfa powoduje, że następuje wzrost ilości składnika użytecznego zarówno w koncentracie \beta jak i w odpadzie \theta, przy czym przy stałym uzysku składnika użytecznego w koncentracie \epsilon stosunek \theta do \beta rośnie liniowo z \alfa. Oznacza to, że przy stałej selektywności procesu separacji a oraz stałym uzysku składnika użytecznego w koncentracie \epsilon wzrost zawartości składnika użytecznego w nadawie \alfa powoduje większy wzrost ilości składnika użytecznego w odpadzie niż w koncentracie.
When mineral processing separation results, for either constant or varying quality of the feed, can be approximated on the so-called Fuerstenau upgrading plots with the same one-fitting parameter a, then this parameter can be used as a selectivity indicator. If the equation has a form [...], where [...] stands for recovery of non-useful component in tailing while\ksi is the recovery of useful component in the concentrate, then at the same selectivity of upgrading (constant a) the increase of the useful component in the feed \alfa results in an increased amount of this component in both concentrate \beta and tailing [...] while the ratio of [...] to \beta is linearly dependent on \alfa when \epsilon is constant. Thus, at a constant selectivity a and constant \epsilon an increase in \alfa leads to a greater increase of the considered component in the tailing \theta than in the concentrate \beta.
Źródło:
Gospodarka Surowcami Mineralnymi; 2011, 27, 2; 33-41
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interrelation of the fuerstenau upgrading curve parameters with kinetics of separation
Autorzy:
Bakalarz, A.
Drzymala, J.
Powiązania:
https://bibliotekanauki.pl/articles/109709.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
separation
upgrading
kinetics
Fuerstenau curve
beneficiation
recovery
selectivity
Opis:
It was shown in the paper that kinetic equations relating recoveries of two components in separation products and time, when combined together to eliminate the time parameter, provide mathematical equations which relate recoveries of the two considered components in concentrate. The obtained one-adjustable-parameter type equations are very useful for approximation of the separation results plotted as the so-called Fuerstenau upgrading curves. Most empirical mathematical formulas presently used for the Fuerstenau plots were derived using various kinetic equations while some are still awaiting for their kinetic derivation.
Źródło:
Physicochemical Problems of Mineral Processing; 2013, 49, 2; 443-451
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selectivity of fishing gear for hairtail fish (Trichiurus lepturus Linnaeus, 1758) commodities in Pangandaran District, Indonesia
Autorzy:
Sienna, Yafi Ibnu
Hasan, Zahidah
Lili, Walim
Dewanti, Lantun Paradhita
Powiązania:
https://bibliotekanauki.pl/articles/1075461.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Beach seines
Gill nets
Pangandaran
Selectivity
Trichiurus lepturus
Opis:
Hairtail fish (Trichiurus lepturus Linnaeus, 1758) are a major commodity of high economic value in Pangadaran. This study aims to determine the most selective fishing gear for hairtail fish commodities based on the frequency of hairtail fish length, the proportion of the main catch and by-catch in Pangandaran District. Data collected are primary and secondary data. Primary data consists of catch data and fish size length. The catch is obtained by collecting the results of landing fish with gill nets and beach seines. Fish size length data obtained through direct measurement when the fish is landed. Secondary data collected is data on capture fisheries production in Pangandaran District. Data analysis consisted of calculation of length size distribution and comparison of main and by-catches with fishing gears. The analysis was carried out with the help of Microsoft Excel software. The results of this study indicate that hairtail fish in Pangandaran District were captured using gill nets and beach seines. Based on the results of the research conducted on August 2018 until January 2019, it can be concluded that gill net fishing gears are more selective compared to beach seines based on several parameters observed, namely the length distribution and the proportion of main catch : by-catch. The results showed that the comparison of the length distribution of hairtail fish that was appropriately caught between gill nets and beach seines was 85.74% : 30,74%. Comparison of the proportion of main catch : by-catch between gill nets and beach seines was 52.38%: 23.57%.
Źródło:
World Scientific News; 2019, 126; 248-260
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
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