Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "B.U." wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 329
Tytuł:
Plant: a necessity of life
Autorzy:
Abubakar, B.U.
Abubakar, S.
Alaku, C.
Nnadi, O.
Powiązania:
https://bibliotekanauki.pl/articles/11487.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
Plant is one of the major forms of life on earth. It can produce its own food but cannot move about. Plants have well organized structures. They are beautiful and they determine local climates and are used as live fences. They phytoremediate and cool our environment. They provide us with oxygen, medicines, fuel, timber, recreation, industrial products; preservatives, pesticides in addition to all the three necessities of life: food, clothing and shelter. They purify the air and water bodies. It is therefore impossible to talk about life without plants because of their importance to the balance of nature. However, people have altered and often degraded their environment, though it has been taking place so gradually that its effects have not been drastically felt. Despite the enormous benefits of plants to humanity, they are disappearing at alarming rates. The reasons for this loss are many and include many anthropogenic activities. It is therefore quite imperative to ensure their effective conservation. This paper summarizes available information about the direct and the indirect benefits of plants and suggests some important measures to ensure their posterity. I hope, by bringing this information together, people will appreciate our plants and be frugal in using them.
Źródło:
International Letters of Natural Sciences; 2014, 15, 2
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The oldest fossil record of the extant penguin genus Spheniscus - a new species from the Miocene of Peru
Autorzy:
Gohlich, U B
Powiązania:
https://bibliotekanauki.pl/articles/23300.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
penguin
fossil record
Peru
Miocene
Spheniscidae
new species
Pisco Formation
Spheniscus muizoni
paleontology
Opis:
Described here is a partial postcranial skeleton and additional disarticulated but associated bones of the new fossil penguin Spheniscus muizonisp. nov. from the latest middle/earliest late Miocene (11–13 Ma) locality of Cerro la Bruja in the Pisco Formation, Peru. This fossil species can be attributed to the extant genus Spheniscus by postcranial morphology and is the oldest known record of this genus. Spheniscus muizonisp. nov. is about the size of the extant Jackass and Magellanic penguins (Spheniscus demersus and Spheniscus magellanicus). Beside Spheniscus urbinai and Spheniscus megaramphus it is the third species of Spheniscus represented in the Pisco Formation. This study contains morphological comparisons with Tertiary penguins of South America and with most of the extant penguin species.
Źródło:
Acta Palaeontologica Polonica; 2007, 52, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
N-(-2-chloroethyl)-N-ethyl-2-bromobenzylamine (DSP-4) neonatal treatment, feeding behavior and 5-HT1B receptor reactivity in adult rats
Wpływ podania N-(-2-chloroethylo)-N-ethylo-2-bromobenzylaminy (DSP-4) u noworodków szczurzych na zachowania związane z przyjmowaniem pokarmów i reaktywność receptora 5-HT1B u dorosłych szczurów
Autorzy:
Ferdyn-Drosik, Marzena
Nowak, Przemysław
Kasperski, Jacek
Muchacki, Rafał
Maksym, Beata
Bałasz, Michał
Beśka, Magdalena
Brus, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/1039759.pdf
Data publikacji:
2009
Wydawca:
Śląski Uniwersytet Medyczny w Katowicach
Tematy:
noradrenergic system
lesion
5-ht1b receptor
food intake
rats
układ noradrenergiczny
lezja
receptor 5-ht1b
przyjmowanie karmy
szczury
Opis:
BACKGROUND: We investigated the reactivity of 5-HT1B receptor in adult rats administered as neonates with noradrenergic neurotoxin N-(-2-chloroethyl)-N-ethyl-2- bromobenzylamine (DSP-4; 50 mg/kg sc x2, P1 and P3). MATERIAL AND METHODS: At 8-10 weeks (after lesion), control and DSP-4 rats were divided into two subgroups injected either with saline or 5-hydroxytryptamine (serotonin; 5-HT) synthesis inhibitor (p-chlorophenylalanine; p-CPA; 100 mg/kg ip x 2 every 24h). On the following day food intake was examined after 5-HT1B receptor ligands administration; agonist CP 94,253, 4.0 mg/kg ip; and antagonist, SB 216641, 4.0 mg/kg ip respectively. Additionally, the level of monoamines, their metabolites and 5-hydroxytrptophane (5- HTP) as an indicator of 5-HT synthesis rate were analyzed by HPLC/ED methods. RESULTS AND CONCLUSIONS: CP 94,253 in a dose of 4.0 mg/kg ip signifi cantly decreased food intake in control and DSP-4 rats in comparison to respective control (saline). 5-HT1B antagonist (SB 216641) alone did not alter the examined parameter but injected 30 min before CP 94,253 markedly abolished its eff ect in both tested groups. Similar results were obtained in p-CPA pretreated animals. The level of amines and their metabolites was not diff erent between control and DSP-4 treated rats. Administration of p-CPA (2 x 100 mg/kg ip) reduced the concentration of 5-HT and 5-hydroxyindoleacetic acid (5-HIAA) in the hypothalamus of control rats by 94.9 % and 96.7 % respectively. In DSP-4 rats the percentage of 5-HT displacement was 92.5 % (5-HT) and 95.7 % (5-HIAA). As it was presented CP 94,253 and SB 216641 alike, administered in doses of 4.0 mg/kg ip, did not alter biogenic amines and their metabolites content in the hypothalamus of both examined groups (control and DSP-4). There were also no diff erences in the 5-HT synthesis rate in the hypothalamus between control and DSP-4 rats after 5-HT1B receptor ligands injection. We concluded that in contrast to our previous studies, DSP-4 being without eff ect on hypothalamus noradrenalin (NA) level and 5-HT synthesis rate did not also aff ect reactivity of terminal 5-HT1B autoreceptors in this brain area. On the basis of this experiments, it should be noted that in contrast to our previous studies which have shown that the consequence of DSP-4 administration is dramatic reduction in the NA contents in the frontal cortex, hippocampus, striatum, etc., with concomitant desensitization of 5-HT1A and 5-HT1B receptors (evaluated by behavioral and biochemical methods), in this experiment, there were no such eff ects. This proves that the noradrenergic fi bers in the hypothalamus are much more resistant to the neurotoxic action of DSP-4, furthermore, for the development of 5-HT1B receptors desensitization in the specifi c brain structure, decrease in NA contents in this part of the brain is required. In other words, a profound dysfunction of the noradrenergic system expresses as noradrenergic fi ber damage in the striatum, frontal cortex, hippocampus, etc. does not aff ect the status of 5-HT1B receptors in the hypothalamus.
WSTĘP: W niniejszej pracy zbadano reaktywność ośrodkowego receptora serotoninergicznego 5-HT1B u dorosłych szczurów, które w okresie noworodkowym otrzymały neurotoksynę N-(-2-chloroethyl)- N-ethyl-2-bromobenzylamine (DSP-4; 50 mg/kg sc x 2, 1-go i 3-go dnia). MATERIAŁ I METODY: W 8-10-tym tygodniu życia zwierzęta kontrolne i z lezją podzielono na dwie podgrupy, jedna otrzymała sól fi zjologiczną, druga inhibitor syntezy serotoniny (5-hydroksytryptaminy; 5-HT) - p-chlorofenyloalaninę (p-CPA). Następnie po podaniu ligandów receptora 5-HT1B (agonisty; CP 94253 4.0 mg/kg ip i/lub antagonisty; SB 216641 4.0 mg/kg ip) oceniono ilość spożywanej karmy. Dodatkowo zbadano również zawartość amin biogennych po podaniu ligandów receptora 5-HT1B oraz oceniono szybkość syntezy serotoniny w podwzgórzu. WYNIKI I WNIOSKI: CP 94253 stosowany zarówno u szczurów kontrolnych jak i DSP-4 zmniejszał ilość spożywanej karmy w porównaniu do odpowiednich grup kontrolnych (po podaniu soli fi zjologicznej). Podobne efekty zaobserwowano u zwierząt, które wcześniej otrzymały p-CPA. Nie stwierdzono zmian zawartości amin biogennych po podaniu DSP-4. Również CP 94253 oraz SB 216641 nie wpływały na stężenie amin biogennych i ich metabolitów w badanej strukturze mózgu. Po podaniu p-CPA (2 x 100 mg/kg ip) obserwowano spadek zawartości 5-HT oraz 5-HIAA w podwzgórzu u kontroli odpowiednio o 94.9% i 96.7%, natomiast w grupie DSP-4 o 92.5 % (5-HT) i 95.7 % (5-HIAA). Szybkość syntezy 5-HT nie różniła się pomiędzy kontrolą a grupą DSP-4, również CP 94253 4.0 mg/kg ip i/lub SB 216641 4.0 mg/kg ip pozostawały bez wpływu na badany parametr. Na podstawie przeprowadzonych eksperymentów stwierdzić należy, że w przeciwieństwie do naszych poprzednich badań, w których wykazaliśmy, że konsekwencją podania DSP-4 jest spadek zawartości NA w korze czołowej, hipokampie i prążkowiu, które wywołuje zjawisko desensytyzacji receptorów 5-HT1A i 5-HT1B (oceniane metodami behawioralnymi i biochemicznymi), w niniejszym doświadczeniu nie stwierdzono takich efektów. Powyższe przemawia za tym, iż zakończenia noradrenergiczne w podwzgórzu są znacznie bardziej oporne na neurotoksyczne działanie DSP-4 oraz, że dla rozwoju desensytyzacji receptorów 5-HT1B w określonej strukturze mózgu konieczny jest spadek zawartości NA w tej części mózgu. Innymi słowy głęboka dysfunkcja układu noradrenergicznego pod postacią zniszczenia zakończeń noradrenergicznych w korze czołowej, prążkowiu oraz hipokampie pozostaje bez wpływu na „status” receptorów 5-HT1B w podwzgórzu.
Źródło:
Annales Academiae Medicae Silesiensis; 2009, 63, 2; 16-23
1734-025X
Pojawia się w:
Annales Academiae Medicae Silesiensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Long-range Interactions for the A$\text{}^{3}$1$\text{}_{u}$ and B$\text{}^{3}$0$\text{}_{u}^{+}$ States of Cd$\text{}_{2}$ from Line Shape Measurements
Autorzy:
Grycuk, T.
Michalicka, M.
Rogaczewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2030719.pdf
Data publikacji:
2002-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.70.-w
34.20.-b
32.70.-n
Opis:
We report on very precise measurements of the absorption profile of the 326.1 nm resonance line of cadmium broadened by interactions with the ground state Cd atoms under thermal equilibrium. The experimental red wing profiles, corrected for the Boltzmann factor at different temperatures, are analysed in terms of the long-range potential parameters including dispersion and resonant interactions. The resonant interaction energy constant C$\text{}_{3}$ is calculated to be 2.31×10$\text{}^{-2}$ eV Å$\text{}^{3}$ and the van der Waals constant C$\text{}_{6}$ for difference potentials between the ground state X$\text{}^{1}$0$\text{}_{ }^{+}$g and the excited states B$\text{}^{3}$0$\text{}_{u}^{+}$ and A$\text{}^{3}$1$\text{}_{u}$ of Cd$\text{}_{2}$ derived experimentally are found to be (182.6± 8) eV Å$\text{}^{6}$ and (289±4) eV Å$\text{}^{6}$, respectively. The former is determined for the first time and the latter is considerably corrected in comparison to earlier determination. The van der Waals constant C$\text{}_{6}$ for the ground state of Cd$\text{}_{2}$ is discussed and estimated to be C$\text{}_{6}^{g}$=(247± 40) eV Å$\text{}^{6}$.
Źródło:
Acta Physica Polonica A; 2002, 101, 6; 825-836
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics Of The Porous Body Sintered By Nano-Sized Fe-Cr-Al Alloy Powder
Charakterystyka porowatego korpusu spiekanego z nanometrycznego proszku stopu Fe-Cr-Al
Autorzy:
Lee, S.-I.
Lee, S.-H.
Gu, B.-U.
Lee, D.-W.
Kim, B.-K.
Powiązania:
https://bibliotekanauki.pl/articles/356635.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Fe-Cr-Al powder
metallic sponges
sintering temperature
oxidation resistance
proszek Fe-Cr-Al
proszek nanometryczny
temperatura spiekania
odporność na utlenianie
Opis:
Porous metal with uniform honeycomb structure was successfully produced by sintering using Fe-Cr-Al nano powder, which was prepared by the pulsed wire evaporation (PWE) in ethanol. Its process consisted of the several steps; 1) coating on the surface of polyurethane sponge with the liquid droplets generated from the ethanol-based slurry where the Fe-Cr-Al nano powders were uniformly dispersed, 2) heat treatment of debinding to remove the polyurethane sponge and 3) sintering of the porous green body formed by Fe-Cr-Al nano powders. The strut thickness of porous Fe-Cr-Al was increased by the increase of spraying times in ESP step. Also, The shrinkages and the oxidation resistance of the sintered porous body was increased with increase of sintering temperature. The optimal sintering temperature was shown to 1450°C in views to maximize the oxidation resistance and sinterability.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1275-1279
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microbial assisted phytoextraction of Cd²⁺ by Salix viminalis under in vitro culture conditions
Autorzy:
Zloch, M.
Furtado, B.U.
Trejgell, A.
Tyburski, J.
Kowalkowski, T.
Szymanska, S.
Hrynkiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/2077661.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Salix viminalis
Streptomyces sp.
cadmium (Cd2+)
BCF – bioconcetration factor
Ti – transloca-
tion index
AF – accumulation factor
Opis:
Microbially assisted phytoremediation is considered as the most promising eco-friendly solution for recultivation of heavy metal polluted soils. In vitro experiments can be favorable systems that allow assessing compatibility and efficiency of both partners (e.g. plant-microorganism) which reduces time and space in the initial stages of this technology. The main objective of this study was: (1) to calculate the Cd2+ accumulation factors (e.g. BCF, Ti, AF) using willow (Salix viminalis L.) inoculated with three Streptomyces sp. strains under in vitro conditions and (2) to compare obtained results with that derived from pot experiments by Złoch et al. (2017). Our results reveal significantly increase in Cd2+ accumulation capacity of Streptomyces spp. inoculated wil- low plants, indicating microbial stimulation of phytoextraction. Additionally, inoculated plants showed higher biomass production and lower lipids peroxidation level. The results revealed significant increase of MEA, BCF, Ti, MER by Strep-1 and Strep-2 in the above-ground parts of inoculated plants. Moreover, of the three strains tested, Strep-1 (Streptomyces sp. SIIB-Zn-R8) demonstrated the highest impact on the Cd2+ phytoextraction efficiency. In conclusion, the proposed in vitro model system allowed predicting Cd2+ phytoextraction capacity per- formed using inoculated willow plants with the significant reduction of both time and space.
Źródło:
Dendrobiology; 2019, 82; 66-77
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Therapeutic potential of cristobalite in the treatment of calf diarrhea
Autorzy:
Ozcan, U.
Sezener, M.G.
Sayilkan, B.U.
Kulluk, E.
Akman, A.
Cetiner, H.
Erguden, V.E.
Yaman, S.
Gumusova, S.
Ciftci, A.
Meral, Y.
Dalgın, D.
Powiązania:
https://bibliotekanauki.pl/articles/16539326.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
calf diarrhea
cristobalite
CS31a
zeolite
Opis:
Calf diarrhea continues to be the major problem of calves in the neonatal period. The effect of zeolites has been increasingly studied in ruminant health in recent years. In the present study, the efficacy of cristobalite, a zeolite, in neonatal calf diarrhea was studied first time. For this purpose, twenty-five neonatal calves with diarrheas were divided into two groups, and Group 1 (n=12) received conventional treatment and Group 2 (n=13) received cristobalite (Zoosorb 10 mg/kg) orally 3 times a day in addition to conventional treatment. Escherichia coli k99 and CS31a, bovine rotavirus and bovine coronavirus were isolated from fecal samples at the beginning of the treatment, on the third day and before discharge. It was determined that the recovery period in Group 2 was 0.95 (20.6%) days shorter than in Group 1 (p<0.05) while no viral agents were found on the fifth day in Group 2, viral shedding continued in 4 of 5 calves in Group 1. In conclusion, the study revealed that cristobalite speeds the recovery time and possibly decreases viral shedding in neonatal calf diarrhea, demonstrating a remarkable efficiency in the treatment.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 3; 437-446
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of vehicular traffic on air permeability and groundnut production in a semi-arid sandy loam soil
Autorzy:
Ohu, J.O.
Mamman, E.
Muni, U.B.
Powiązania:
https://bibliotekanauki.pl/articles/26496.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
air permeability
production
groundnut
tillage
agriculture
soil
compaction
semi-arid sandy loam soil
mechanization
vehicular traffic
Źródło:
International Agrophysics; 2006, 20, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The association in mice of intestinal inflammation elevated levels of phospholipase B, and expulsion of Trichinella spiralis
Związek przyczynowy zapalenia jelita cienkiego, podwyższonego poziomu fosfolipazy B i wydalania Trichinella spiralis u myszy doświadczalnych
Prichinnaja svjaz' vospalenija tonkogo kishechnika, povyshennogo urovnja fosfolipazy B i ehkskrecii Trichinella spiralis u ehksperimental'nykh myshejj
Autorzy:
Larsh Jr., J.E.
Powiązania:
https://bibliotekanauki.pl/articles/2165444.pdf
Data publikacji:
1975
Wydawca:
Polskie Towarzystwo Parazytologiczne
Źródło:
Wiadomości Parazytologiczne; 1975, 21, 4-5; 679-682
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical Cartesian coordinate solutions of Laplace equations by separation of variable method in mathematical physics
Autorzy:
Madububa, B. I.
Mbagwu, JP. C.
Jonas, C. I.
Odionyenma, U. B.
Powiązania:
https://bibliotekanauki.pl/articles/1193372.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cartesian coordinates
Dimensions of space
Laplace equations
Partial derivatives
Potential
Separation of variables
Opis:
This research aimed at solving the Cartesian coordinates of two and three dimensional Laplace equations by separation of variables method. It was painstakingly solved with appropriate boundary conditions of steady states. However, the solution of potential (V) of a partial differential equation (PDE) in three real variables x,y and z are functionally obtained using separation of variable approach by stating the boundary conditions of the Cartesian coordinates.
Źródło:
World Scientific News; 2021, 155; 80-97
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bdellovibrio and like organisms: The much-anticipated “magic bullet”
Autorzy:
Ebana, R. U. B.
Edet, U. O.
Anosike, I. K.
Etok, C. A.
Powiązania:
https://bibliotekanauki.pl/articles/1077314.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antimicrobial agent
Bdellovibrio
Predation
Resistance
biocontrol agents
Opis:
With advances in next generation sequencing and microscopy, a clearer picture is beginning to emerge about the predatory properties of Bdellovibrio and like organisms (BALOs). BALOs are Gram negative microorganisms which are natural predators of other Gram-negative microorganisms, especially those associated with diseases in humans and animals. One of the limitations of BALOs is their inability to prey upon Gram-positive organisms that cause the bulk of human diseases. The global spread of antibiotics resistance to almost every group of antibiotics, and the paucity of newer antibiotics since 1970s is very worrisome. The ability of BALOs to decimate pathogen populations principally those carrying multidrug résistance genes coupled with the increasing rate of antibiotics resistance, has made them an attractive option as biocontrol agents. With the absence of resistance to BALOs, these much anticipated “magic bullets” will certainly find more and more applications in health, agriculture, medicine and environment in the nearest future.
Źródło:
World News of Natural Sciences; 2019, 23; 233-249
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antimicrobial studies and phytochemical analysis of the fruits and leaves of Cnestis ferruginea
Autorzy:
Ebana, R. U. B.
Edet, U. O.
Atang, D. E.
Iyere, L. A.
Powiązania:
https://bibliotekanauki.pl/articles/1076689.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antimicrobials
Cnestis ferruginea
GC-MS
Phytochemicals
clinical isolates
resistance
Opis:
Few studies have shown that Cnestis ferruginea possess some therapeutic properties. The present study was aimed screening the extracts of the fruits and leaves of Cnestis ferruginea for phytochemicals using crude screening and gas chromatography-mass spectrophotometer (GC-MS) methods, and also antimicrobial activity against clinical isolates. Preparation of the extracts (aqueous and ethanolic), identification of isolates, and antimicrobial sensitivity were done using previously reported standard methodologies. Replicate readings for the antimicrobial sensitivity were analysed using analysis of variance at 95% level of significance. The result of the crude qualitative screening revealed the presence of phenol, terpenes, alkaloids, saponins, tannin and polyphenol in various amounts in both the leaves and fruits. Quantitative analysis using GC-MS revealed a total of 14 similar phytochemicals each in the leaves and fruits of the study plant in varying amounts. In the fruits, phenol had the highest concentration of 15.01%, followed by terpenes (10.64%), alkaloid (5.43%), and tannins (5.16%). Others were anthocyanins, phytate, phytosterol, steroids, saponins, cardiac glycosides, oxalate, flavonoids, cyanogenic glycosides and coumarin with concentrations that ranged from to 0.01- 4.21%. On the other hand, in the leaves, alkaloids had the highest concentration of 31.62%, followed by phenol (20.59%), phytate (15.18%), and tannin (12.34%). Others include were flavonoid, terpenes, phytosterol, cardiac glycosides, saponins, cyanogenic glycosides, oxalate, anthocyanins, steroids and coumarin with concentrations that ranged from 0.16-8.45%. The isolates were identified as Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Proteus spp. The results of the antimicrobial sensitivity revealed varying zones of inhibitions; however, it increased as the concentration of the extract increased. The observed highest zones of inhibitions were 33.86 mm for the fruit ethanolic extract and 30.56 mm for the aqueous extract of the leaves against Proteus and Staphylococcus aureus, respectively.
Źródło:
World News of Natural Sciences; 2019, 25; 188-198
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation of vanconycin resistant Staphylococcus aureus from the wounds of hospital patients in Uyo, Akwa Ibom State, Nigeria
Autorzy:
Anosike, I. K.
Ebana, R. U. B.
Edet, U. O.
Umoh, I. S.
Powiązania:
https://bibliotekanauki.pl/articles/1076716.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Methicillin
Staphylococcus aureus
Vancomycin
Wounds
antibiotic resistance
Opis:
Staphylococcus aureus is a very important human pathogen that generates a number of human infections. Isolation of vancomycin-resistant Staphylococcus aureus (VRSA) was carried out from wound samples of patients attending University of Uyo Teaching Hospital, Akwa Ibom state, Nigeria. A total of 45 wound samples from 15 patients were collected aseptically in triplicate, using sterile cotton swabs moistened in sterile normal saline. Microbiological analysis and susceptibility to vancomycin, including minimum inhibitory and minimum bactericidal concentrations (MIC and MBC), were carried out using standard methodologies. A total of 15 isolates were obtained and these showed varying MIC and MBC patterns. Out of the 15 S. aureus isolated, only one isolate had an MIC of approximately 4 µg/ml, while twelve isolates gave MIC values that ranged from 15.62 µg/ml to 250 µg/ml. The remaining 2 isolates gave MIC values that were ≥ 500 µg/ml. These 2 isolates exhibited alpha haemolysis on blood agar, unlike the others that were beta haemolytic. The results of the MBC also showed variations amongst the isolates. A total of 10 isolates gave MBC values that ranged from 62.5 µg/ml to 500 µg/ml, while the remaining 5 isolates gave MBC values that were ≥ 500 µg/ml. The high MIC and MBC values obtained showed that vancomycin-resistant Staphylococcus aureus is increasing at an alarming rate, and this accounts for the gradual decline in the effectiveness associated with the use of vancomycin. Given the widespread prevalence of VRSA, there is a need for newer therapeutics that can reverse this surge.
Źródło:
World News of Natural Sciences; 2019, 24; 134-144
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 329

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies