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Raziskovanje identitete v korejski diasporični fikciji: Analiza lika Henryja Parka v romanu Native Speaker avtorja Chang-Rae Leeja
Full text linkThis study examines the complex identity issues faced by Henry Park, the protagonist of Chang-Rae Lee’s novel Native Speaker, through the lens of Hannah Arendt’s concepts of the pariah and parvenu. By examining Henry’s experiences as a 1.5-generation Korean-American immigrant, this analysis elucidates the tensions between cultural assimilation and heritage preservation. The study describes Henry as a “Lesser Stranger”, a nuanced identity state situated between complete alienation and full assimilation. Furthermore, the analysis draws parallels with Frantz Fanon’s Black Skin, White Masks in order to gain further insight into Henry’s internal conflict and external societal pressures. In conclusion, this paper offers a comprehensive examination of the Korean-American experience, contributing to broader discussions on diaspora, identity, and cultural integration.Študija se poglablja v zapletene identitetne boje Henryja Parka, protagonista romana Native Speaker avtorja Chang-Rae Leeja, skozi prizmo konceptov parija in parvenuja, ki ju je razvila Hannah Arendt. S proučevanjem Henryjevih izkušenj kot 1,5-generacijskega korejsko-ameriškega priseljenca ta analiza poudarja napetosti med kulturno asimilacijo in ohranjanjem dediščine. Študija uvaja pojem Henryja kot »manj tujega« (Lesser Stranger), niansirano stanje identitete, ki je postavljeno med popolno odtujenost in popolno asimilacijo. Prav tako vzpostavlja vzporednice s Frantzom Fanonom in njegovim delom Črna koža, bele maske, da bi bolje razumeli Henryjev notranji konflikt in zunanje družbene pritiske. Za konec članek ponuja celovito raziskavo korejsko-ameriške izkušnje ter prispeva k širšim razpravam o diaspori, identiteti in kulturni integraciji
EKSPLOZIVNA MOČ IN GIBLJIVOST: KLJUČNI DEJAVNIKI PRI IZVEDBI SKOKA PREDNOŽNO ZANOŽNO STRIŽNO
No full textThe aim of this study was to determine the relationship between explosive strength and the level of flexibility of the lower limbs during the switch leap. The study involved 11 female artistic gymnasts in the junior and senior categories. The My Jump 2 application and the Filtro Jumper device were used to measure jump height and power in the active take-off phase in 10-s repetitive jump tests with arm fixation and arm movement as well as in the switch leap. Flexibility level was assessed using FIG tests in which the extension and flexion of the dominant lower limbs were evaluated. Performance in the alternating jump was assessed by judges using video recordings. The height of the switch leap correlated with lower limb flexibility (r = 0.863**, p=0.001) and with the height achieved in the 10-s arm fixation jump test (r = 0.740**, p=0.009). A significant correlation was found between the height of the switch leap and the power of the active take-off phase in the 10-second arm fixation test (r = 0.671*, p=0.024). In addition, a significant correlation was found between the power in the active take-off phase of the switch leap and the flexibility level (r=0.685*, p=0.020). The correlation between the evaluation value and the level of flexibility was confirmed (r=0.634*, p=0.036). It was shown that explosive strength and the level of flexibility contribute significantly to the execution of the switch leap.Namen te raziskave je bil določiti povezavo med eksplozivno močjo in stopnjo gibljivosti spodnjih okončin pri skoku prednožno zanožno strižno. Raziskava je zajemala 11 ritmičark v mladinski in članski kategoriji. Za merjenje višine skoka in moči v dejavnem delu odriva sta bili uporabljeni orodji My Jump 2 in naprava Filtro Jumper pri 10-sekundnih ponavljajočih se meritvah skoka z določeno postavitvijo rok in gibanjem rok ter pri skoku prednožno zanožno strižno. Stopnja gibljivosti je bila ocenjena z uporabo FIG testov, pri katerih so ocenjevali izteg in upogib prevladujočih spodnjih okončin. Izvedba skoka z prednožno zanožno strižno je bila sodniško ocenjena na osnovi posnetkov. Višina skoka je soodvisna od gibljivosti spodnjih okončin (r = 0,863**, p=0,001) in z višino doseženo v 10-sekundni meritvi skoka z določeno postavitvijo rok (r = 0,740**, p=0,009). Pomenljiva soodvisnost je bila ugotovljena med višino skoka in močjo dejavnega dela odriva v 10-sekundni meritvi z določeno postavitvijo rok (r = 0,671*, p=0,024). Poleg tega je bila ugotovljena pomembna soodvisnost med močjo v dejavnem delu odriva skoka in stopnjo gibljivosti (r=0,685*, p=0,020). Povezanost med vrednostjo ocene in stopnjo gibljivosti je bila potrjena (r=0,634*, p=0,036). Pokaže se, da eksplozivna moč in stopnja gibljivosti pomembno prispevata k izvedbi skoka prednožno zanožno strižno
Krhka trajnostnost ali trajnostna krhkost? Lokalno razumevanje globalnih pojmov v Logarski dolini
Full text linkThis article explores the materialisations of sustainability in the Logar Valley, an Alpine tourist destination in Slovenia. Drawing on ethnographic research, we examine how sustainability is understood and enacted by local tourism service providers, highlighting four key themes: food practices, the temporalities of tourism, transport, and environmental care. We argue that the local perceptions of sustainability, fragility, and tradition, especially when understood in the context of tourism, function as closely interlinked emic concepts. They serve as a tool or discursive strategy according to which the various actors in Solčavsko position themselves within the multiplicity of social relations between us and them, past and future, nature and culture, tradition and innovation, good and bad. They can thus be understood as socially acceptable tools used by the actors to express their interests in a way that makes these interests appear as “objective”, “rational” or “universally valid” truths.Članek obravnava materializacijo trajnostnosti v Logarski dolini, alpski turistični destinaciji v Sloveniji. Na podlagi etnografskih raziskav preučujeva, kako trajnostni razvoj razumejo in izvajajo lokalni turistični ponudniki, pri čemer izpostavljava štiri ključne teme: prehranjevalne prakse, časovne značilnosti turizma, prevoz in z njim povezano infrastrukturo ter skrb za okolje. Ugotavljava, da lokalne predstave o trajnostnosti, krhkosti in tradiciji, zlasti če jih razumemo v kontekstu turizma, delujejo kot med seboj tesno povezani emski koncepti. Predstavljajo namreč orodje ali diskurzivno strategijo za različne akterje na Solčavskem, na podlagi katere se pozicionirajo v mnogoterih družbenih odnosih med nami in njimi, preteklostjo in prihodnostjo, naravo in kulturo, tradicijo in inovacijo, dobrim in slabim. Lokalna dojemanja trajnostnosti lahko torej razumemo tudi kot družbeno sprejemljiva orodja, s katerimi akterji svoje interese izražajo na način, ki jih kaže kot »objektivne«, »racionalne« ali »univerzalno veljavne« resnice
Prilagodljivost, selekcija in prehranska vrednost klonskihpopulacij česna (Allium sativum L. ssp. sativum) v lesostepju Ukrajine
Full text linkThe purpose of this study was to identify the degree of emergence and impact on the yield of weakened shoots of softneck forms of garlic and comprehensive study of the parameters of adaptive variability and selection value. During 2020–2022, nine local and introduced samples of garlic were studied in the field conditions. Research has established that the formation of a reduced flower-bearing shoot reduces the mass of the bulb by 7.6–31.1 %, and the yield by 6.1–38.6 %. The results indicate that the higher the relationship between the genetic and environmental coefficient of variation, the higher the heritability value. The following samples were selected as the starting material for further selection based on the yield: according to adaptability and ecological plasticity – Nos. ‘A.s.16/16’ and ‘A.s.44/17’; in terms of stability – Nos. ‘A.s.19/16’, ‘A.s.35/16’ and ‘A.s.43/17’ and samples of the intensive type – ‘A.s.16/16’, ‘A.s.27/16’, ‘A.s.33/16’ and ‘A.s.44/17’, which will ensure high yields in optimal cultivation conditions. The obtained data will serve as the basis for the selection research scheme in the conditions of introduction in Ukraine. As a result of the research, a working collection of raw material was created for the selection of garlic.Namen te raziskave je bil določiti velikost vznika in njegov vpliv na pridelek česna brez cvetočih poganjkov kot tudi obširnejša raziskava parametrov prilagodljivosti s selekcijsko vrednostjo. V rastnih sezonah 2020–2022 je bilo preučevanih devet lokalnih in tujih vzorcev česna v poljskih razmerah. V raziskavi je bilo ugotovljeno, da tvorba cvetočih poganjkov zmanjša maso čebulic za 7,6–31,1 % in pridelek za 6,1–38,6 %. Rezultati nakazujejo, da večje kot je razmerje med koeficientoma genetske in okoljske variabilnosti, večja je vrednost dedovanja. Naslednji vzorci so bili izbrani kot začetni material za bodočo selekcijo na osnovi pridelka: glede na prilagodljivost in ekološko plastičnost vzorca Nos. ‘A.s.16/16’ in ‘A.s.44/17’; glede na stabilnost vzorci Nos. ‘A.s.19/16’, ‘A.s.35/16’ in ‘A.s.43/17’ ter vzorci intenzivnega tipa ‘A.s.16/16’, ‘A.s.27/16’, ‘A.s.33/16’ in ‘A.s.44/17’, ki zagotavljajo velike pridelke in optimalne pridelovalne razmere. Pridobljeni podatki bodo služili kot osnova za načrt selekcije pri uvajanju v razmere pridelovanja v Ukrajini. Kot rezultat raziskave je bila osnovana zbirka izhodiščnega materiala za selekcijo česna
Antioksidativna aktivnost in vsebnost kovin: študija na Dictamnus albus
Full text linkDictamnus albus is a perennial plant of warm, dry, and sunny habitats that have been traditionally used as a medicinal plant since ancient times. Our study focused on examining the phenolic compound content, antioxidant capacity, and concentrations of Fe, Cu, Zn, Mn, and Ni in the leaves of D. albus. The concentration of phenolic compounds in the leaves of D. albus was 5.40±0.09 mg GAE/gDW. The leaf ethanol extract of D. albus exhibited significant antioxidant activity, as demonstrated by its ability to scavenge DPPH radicals, with an IC50 value of 38.20±0.46 μg/mL. The ethanol extract showed a slightly lower capacity to scavenge H2O2, with an IC50 value of 912±40 μg/mL. For the first time, we demonstrated that D. albus extract has a significant capacity to scavenge hydroxyl radicals (•OH). After adding D. albus extract, the residual •OH radicals percentage was 39%, compared to 13% when using a 2 mM Trolox standard. In addition, the ethanol extract of D. albus showed the ability to reduce Fe3+ and Cu2+, indicating the extract\u27s ability to inhibit oxidative processes. Furthermore, D. albus extract can chelate Fe and thus prevent the Fenton reaction. The metal content in the leaves of D. albus was as follows: Fe 44.16±0.685 mg/kg, Cu 6.06±0.253 mg/kg, Zn 21.64±0.571 mg/kg, Mn 22.01±0.413 mg/kg, and Ni 1.21±0.112 mg/kg. Our results showed that the ethanol extract of D. albus has significant antioxidant capacity, that the concentrations of Fe, Cu, Zn, Mn, and Ni were below permissible doses for medicinal plants, and that the extract can contribute to the daily intake of these essential elements. These findings suggest that D. albus extract could be used in the therapy of diseases associated with oxidative stress.Dictamnus albus je trajnica toplih, suhih in sončnih rastišč, ki se že od nekdaj tradicionalno uporablja kot zdravilna rastlina. V naši študiji smo se osredotočili na preučevanje vsebnosti fenolnih spojin, antioksidativne zmogljivosti in koncentracij Fe, Cu, Zn, Mn in Ni v listih D. albus. Koncentracija fenolnih spojin v listih D. albus je bila 5,40±0,09 mg GAE/gDW. Etanolni izvleček listov D. albus je pokazal pomembno antioksidativno aktivnost, demonstrirano z zmožnostjo odstranjevanja radikalov DPPH z vrednostjo IC50 38,20±0,46 μg/mL. Etanolni izvleček je imel nekoliko manjšo sposobnost za odstranjevanjeH2O2 z vrednostjo IC50 912±40 μg/mL. Prvič smo dokazali, da ima izvleček D. albus pomembno sposobnost odstranjevanja hidroksilnih radikalov (•OH). Po dodatku izvlečka D. albus je bil odstotek preostalih •OH radikalov 39 % v primerjavi s 13 % pri uporabi 2 mM standarda Trolox. Poleg tega je etanolni izvleček D. albus pokazal sposobnost redukcije Fe3+ in Cu2+, kar kaže na sposobnost izvlečka, da zavira oksidativne procese. Izvleček D. albus kelatira tudi Fe in tako prepreči Fentonovo reakcijo. Vsebnost kovin v listih D. albus je bila naslednja: Fe 44,16±0,685 mg/kg, Cu 6,06±0,253 mg/kg, Zn 21,64±0,571 mg/kg, Mn 22,01±0,413 mg/kg in Ni 1,21±0,112 mg/kg. Naši rezultati so pokazali, da ima etanolni izvleček D. albus pomembno antioksidativno sposobnost, da so koncentracije Fe, Cu, Zn, Mn in Ni pod dovoljenimi odmerki za zdravilne rastline in da lahko izvleček prispeva k dnevnemu vnosu teh bistvenih elementov. Te ugotovitve kažejo, da bi se lahko izvleček D. albus uporabljal pri zdravljenju bolezni, povezanih z oksidativnim stresom
Ocenjevanje mišične obremenitve Gastrocnemius medialis na podlagi elektromiograma z uporabo algoritmov strojnega učenja
Full text linkSurface electromyography (sEMG) is the primary technique for recording muscle activity by capturing the electrical signal from the muscles. The present study has been undertaken to analyze lower limb muscle stress of gastrocnemius medialis without and with a workout (exercise) using machine learning algorithms. Ten healthy subjects (Seven male & three female) have been chosen on the basis of their age, height and mass. The experiment has been conducted without a workout and with a workout having a set of 10 kg resistance band loads for the gastrocnemius medialis muscle of the right leg. Fourth-order Butterworth filters and full wave rectifiers have been employed in data preprocessing. Many features have been extracted, including mean absolute value (MAV), average, skewness, kurtosis, zero crossing (ZC), slope sign change (SSC), waveform length (WL), mean frequency (MNF), median frequency (MDF), power spectral density (PSD), short-time Fourier transform (STFT) and wavelet transform (WT). Feature selection has been used to reduce the dimensionality of the data after feature extraction, which lowers computing costs and the risk of overfitting. This increases the accuracy of the classifiers. Principal component analysis (PCA) and independent component analysis (ICA) are two dimensionality reduction approaches used for EMG signal classification. Moreover, in the present study, decision trees (DT), random forests (RF) and support vector machines (SVM) have been used as classifiers. After the data has been preprocessed, the RMS value is obtained as the best-performing feature among all the other features. Then, the stress (RMS value) is analyzed for workout (warm-up), i.e., exercise and without workout cases. The stress value for a workout (warm-up) is found to be less than that without a workout case. Moreover, individuals taking up warming-up exercises proved to be giving more accuracy (79%) with respect to their contemporaries (70%). So, in order to improve the accuracy of the workout (exercise), dimensionality reduction techniques (PCA and ICA) have been applied. The dataset is divided into training, testing and validation at a ratio of 70:20:10 respectively. Better accuracy (99.2%) is obtained when PCA is used as a dimensionality reduction technique, and SVM is used as a classifier. The proposed technique attains 99.2% accuracy with RMS as feature extraction, PCA as a dimensionality reduction and SVM as a classifier.Površinska elektromiografija (sEMG) je primarna tehnika za beleženje mišične aktivnosti z zajemanjem električnega signala iz mišic. Ta študija je bila izvedena za analizo mišičnega stresa spodnjih okončin gastrocnemiusa medialisa brez in z vadbo (vadbo) z uporabo algoritmov strojnega učenja. Deset zdravih oseb (sedem moških in tri ženske) je bilo izbranih na podlagi njihove starosti, višine in mase. Poskus je bil izveden brez vadbe in z vadbo z nizom 10 kg upornih obremenitev za mišico gastrocnemius medialis desne noge. Butterworthovi filtri četrtega reda in polnovalni usmerniki so bili uporabljeni pri predprocesiranju podatkov. Izločenih je bilo veliko funkcij, vključno s srednjo absolutno vrednostjo (MAV), povprečjem, asimetrijo, kurtozo, prečkanjem ničle (ZC), spremembo predznaka naklona (SSC), dolžino valovne oblike (WL), srednjo frekvenco (MNF), srednjo frekvenco (MDF), spektralno gostoto moči (PSD), kratkotrajno Fourierjevo transformacijo (STFT) in valovno transformacijo (WT). Izbira funkcij je bila uporabljena za zmanjšanje dimenzionalnosti podatkov po ekstrakciji funkcij, kar znižuje stroške računalništva in tveganje prevelikega opremljanja. To poveča natančnost klasifikatorjev. Analiza glavnih komponent (PCA) in analiza neodvisnih komponent (ICA) sta dvodimenzionalna pristopa zmanjšanja, ki se uporabljata za klasifikacijo signala EMG. Poleg tega so v tej študiji kot klasifikatorji uporabljeni odločitvena drevesa (DT), naključni gozdovi (RF) in podporni vektorski stroji (SVM). Po predhodni obdelavi podatkov se pridobi RMS vrednost kot najuspešnejša funkcija med vsemi drugimi značilnostmi. Nato se stres (RMS vrednost) analizira za vadbo (ogrevanje), torej primere vadbe in brez vadbe. Ugotovljeno je, da je vrednost stresa za vadbo (ogrevanje) manjša od tiste brez primera za vadbo. Poleg tega se je izkazalo, da so posamezniki, ki izvajajo ogrevalne vaje, bolj natančni (79 %) v primerjavi s svojimi vrstniki (70 %). Torej, da bi izboljšali natančnost vadbe (vadbe), so bile uporabljene tehnike zmanjšanja dimenzij (PCA in ICA). Nabor podatkov je razdeljen na usposabljanje, testiranje in validacijo v razmerju 70:20:10. Boljša natančnost (99,2 %) je dosežena, če se PCA uporablja kot tehnika zmanjševanja dimenzij, SVM pa se uporablja kot klasifikator. Predlagana tehnika doseže 99,2-odstotno natančnost z RMS kot ekstrakcijo značilnosti, PCA kot zmanjšanje dimenzij in SVM kot klasifikator
Digitalni tisk poliamida in mešanic bombaž-poliamid
Full text linkKnitted fabrics with different compositions, i.e. 100% cotton (CO), 100% polyamide (PA), and a blend of 50% cotton and 50% polyamide (CO/PA), were digitally printed with reactive dyes. The cotton fabric was pretreated with a conventional alkaline solution of alginate thickener, sodium carbonate and urea (A). The polyamide fabric was pretreated with an acidic solution of galactomannan thickener (GM). The CO/PA blend was pretreated once with the alginate and once with the galactomannan preparation. The aim of the study was to determine whether the proposed preparation is suitable for printing polyamide with reactive dyes and which preparation is more suitable for printing the cotton-polyamide blend. The CIE L*a*b* colour values, the colour depth (K/S) and the dye penetration of the printed samples were compared. It was determined that under the same printing conditions, the highest colour depth was achieved on cotton, while a lower depth was recorded on polyamide. The colour depth on the cotton-polyamide blend was lower than on the two pure fabrics. For some colours, the colour depth was higher with the alginate thickener preparation, for others with the galactomannan thickener, so that no definitive preference for one preparation over the other can be given for printing blends. The colour fastness of the prints to dry rubbing (crock test), light and washing at 40 °C was acceptable for all samples.Pletivo z različno surovinsko sestavo: 100-odstotni bombaž (CO), 100-odstotni poliamid (PA) in mešanica 50 % bombaža in 50 % poliamida (CO/PA) je bilo digitalno tiskano z reaktivnimi barvili. Bombažno blago je bilo pred tiskanjem impregnirano z alkalno raztopino alginatnega zgostila, natrijevega karbonata in sečnine (A). Poliamidno blago je bilo impregnirano s kislo raztopino galaktomananskega zgostila (GM). Mešanica CO/PA je bila impregnirana ali z alginatno ali z galaktomanansko apreturo. Namen raziskave je bil ugotoviti, ali je predlagana apretura primerna za digitalno tiskanje poliamida z reaktivnimi barvili in katera apretura je bolj primerna za tiskanje mešanice iz bombaža in poliamida. Na vzorcih, potiskanih s cian, magenta, rumeno in črno, so bili izmerjeni CIE L*a*b*barvne vrednosti, globina barvnih tonov (K/S) in pretisk barvila na hrbtno stran blaga. Ugotovljeno je bilo, da se pri istih pogojih tiskanja dosežejo najvišje K/S vrednosti na bombažu in nižje na poliamidu. Globina barve na mešanicah je bila nižja kot na obeh čistih pletivih. Za nekatere barve so bile K/S-vrednosti višje ob impregnaciji z alginatnim zgostilom, za nekatere z galaktomananskim zgostilom, tako da za nobeno apreturo ne moremo reči, da je primernejša za tiskanje mešanic bombaž/poliamid. Barvne obstojnosti tiskov na suho drgnjenje (crock test), svetlobo in pranje pri 40 °C so bile ustrezne pri vseh vzorcih
Večfunkcionalne lastnosti bombažne tkanine, pripravljene z zeleno sintezo kompozita TiO2/kurkumin
Full text linkIn this study, a novel green process was developed to produce a multifunctional cotton (CO) fabric incorporating TiO2/curcumin composites that simultaneously provides UV protection and photocatalytic performance. For this purpose, TiO2 was synthesised using the sol–gel process; loaded with the natural colourant curcumin as a visible light absorber at two temperatures, i.e., 70 and 350 °C; and applied to the CO fabric via the pad–dry–cure process. For comparison, TiO2 was synthesised without curcumin under the same conditions. The synthesis conditions at 70 °C ensured the formation of predominantly amorphous TiO2, while curcumin promoted TiO2 crystallisation despite the low synthesis temperature. A 350 °C synthesis temperature was high enough to form the polymorphic TiO2 anatase phase. Although the increase in synthesis temperature and the presence of curcumin in the composites caused a bathochromic shift in light absorption, the photocatalytic activity of all samples was mainly driven by UV light. Chemically modifying the CO fabric significantly reduced the light transmittance of the samples, with the highest absorption of UV light obtained for the sample containing the TiO2/curcumin composite synthesised at 70 °C. This sample provided excellent UV protection with a UPF value of 51.6. All chemically modified CO samples showed photocatalytic activity, degrading coffee stains and decolourising methylene blue and Rhodamine B dye solutions. The highest photocatalytic efficiency and recyclability were obtained again for the CO sample with the TiO2/curcumin composite synthesised at 70 °C, demonstrating the synergistic effect between TiO2 and curcumin in the composite prepared under these synthesis conditions.Razvit je bil nov zelen postopek za izdelavo večfunkcionalne bombažne (CO) tkanine z vgrajenimi kompoziti TiO2/kurkumin, ki hkrati zagotavlja UV-zaščito in fotokatalitsko delovanje. V ta namen je bil sintetiziran TiO2 s hidrotermalno podprtim postopkom sol-gel v prisotnosti naravnega barvila kurkumina kot stabilizatorja in absorberja vidne svetlobe pri dveh temperaturah, in sicer 70 in 350 °C, ter nanesen na CO-tkanino z impregnirnim postopkom. Za primerjavo je bil TiO2 sintetiziran pri enakih pogojih brez prisotnosti kurkumina. Pogoji sinteze pri 70 °C so omogočili nastanek pretežno amorfnega TiO2, je pa prisotnost kurkumina podprla kristalizacijo TiO2 kljub nizki temperaturi sinteze. Temperatura sinteze 350 °C je bila dovolj visoka za tvorbo TiO2 v polimorfni fazi anatasa. Čeprav sta zvišanje temperature sinteze in prisotnost kurkumina v kompozitih povzročila batokromni premik absorbirane svetlobe, je bila fotokatalitska aktivnost vseh vzorcev pogojena predvsem z UV-svetlobo. Kemijska modifikacija CO-tkanine je bistveno zmanjšala prepustnost svetlobe vseh vzorcev, pri čemer je bila najvišja absorpcija UV-svetlobe dosežena pri vzorcu, ki je vseboval kompozit TiO2/kurkumin, sintetiziran pri 70 °C. Ta vzorec je zagotovil odlično UV-zaščito z UPF vrednostjo 51,6. Vsi kemijsko modificirani CO-vzorci so bili fotokatalitsko aktivni, kar je privedlo do razgradnje madežev kave in razbarvanja raztopin barvil metilensko modro in Rhodamine B. Največji fotokatalitska učinkovitost in sposobnost ponovne uporabe sta bili tudi v tem primeru doseženi pri CO vzorcu s kompozitom TiO2/kurkumin, sintetiziranim pri 70 °C, kar kaže na sinergijski učinek med TiO2 in kurkuminom v kompozitu, pripravljenim pri teh sinteznih pogojih
Med- in povojne zaplembe vzhodnoazijskih predmetov, shranjenih v zbirkah Pokrajinskega muzeja Celje
Full text linkThe article attempts to clarify, on the basis of laws adopted during and after the Second World War, how East Asian items became part of the museum collections held today by the Celje Regional Museum (Pokrajinski muzej Celje, PMC). The first part of the article focuses on confiscations of cultural and historical objects carried out by the Nazis in Lower Styria (Untersteiermark) between 1941 and 1945. The second part of the article covers the period immediately after the end of the Second World War. This was the period that saw the start of the formation of so-called national property, in other words the passage of ownership from private to state hands. As will be shown, a series of laws regulating the new authorities’ attitude towards property were passed in a relatively brief period. In the summer of 1945, the task of collecting cultural and historical objects was taken over by collection centres established for this purpose. One such collection centre was located in Celje. With the help of archival sources, we have attempted to shed light on its operations.Prispevek poskuša na podlagi zakonov, sprejetih med vojno in po njej, pojasniti, kako so vzhodnoazijski predmeti sploh postali del muzejskih zbirk, ki jih danes hranijo v Pokrajinskem muzeju Celje. Prvi del prispevka se osredotoča na nacistične zaplembe kulturno-zgodovinskih predmetov na Spodnjem Štajerskem med letoma 1941 in 1945. Drugi del prispevka obravnava čas neposredno po koncu druge svetovne vojne, ko se je začela oblikovati t. i. narodna imovina, se pravi prehod lastništva iz zasebne v državno last. Kot bo prikazano, se je v kratkem času zvrstila množica zakonov, ki so urejali novi odnos do premoženja. Nalogo zbiranja kulturno-zgodovinskih predmetov so poleti 1945 prevzeli v ta namen ustanovljeni zbirni centri. Eden izmed takšnih zbirnih centrov je bil tudi v Celju. S pomočjo arhivskih virov smo poskusili osvetliti njegovo delovanje
Insecticidal effect of Essential Oils of Citrus limon, Cymbopogon citratus and Syzygium aromaticum and their Synergistic Combinations Against Anopheles Mosquitoes
Full text linkWhile synthetic insecticides offer effective pest control, their many side effects necessitate exploring alternatives, this study investigates the insecticidal potential of essential oils from lemon (Citrus limon), lemongrass (Cymbopogon citratus), and clove (Syzygium aromaticum) against Anopheles mosquitoes, a prime vector of malaria, a deadly global disease.
The oils were extracted via hydro-distillation, Gas Chromatography-Mass Spectrometry (GC-MS) was used to analyze the chemical profiles. The insecticidal activity was tested using a susceptibility test to evaluate the knockdown, mortality rates and time against adult mosquitoes following standard protocols.
The extraction procedure yielded of 0.5, 0.48, and 0.2% were obtained for Lemon, Lemongrass, and Clove respectively. GC-MS showed limonene as the dominant compound in lemon oil (66.4%), while citral a (48.26%) and citral b (39.85%) were most abundant in lemongrass oil, and that of Clove is eugenol (68.98%). Adulticidal efficacy results put clove oil to have the best activity with a knockdown rate of 75 ± 0.75 at 14 minutes, a mortality rate of 45 ± 0.74 at 25 minutes, lemon oil exhibited the least activity with 30 ± 0.866 knockdown rate at 26 minutes, a mortality rate of 15 ± 0.47 at 42 minutes. However, the combination of Lemongrass and Clove (FM2) demonstrated an enhanced overall insecticidal efficacy beyond the capabilities of individual oils with a knockdown rate of 85 ± 0.25 at 7 minutes and a mortality rate of 60 ± 0.37 at 16 minutes.
Despite mosquitoes’ resistance to the individual oil, these findings suggest that these oils can be optimized for more effective insect control when combined, consequently, this research has contributed to the quest for a better, cheaper, safer and eco-friendly for mosquito control