Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Effect of aminoacids on the fungicidal activity of quaternary ammonium salts

100%

Piatkowski J., Swiatek M.

Acta Mycologica

|

2010

|

tom 45

|

nr 2

Amphipatic compounds exhibit an antimicrobial action both on bacteria and fungi. It is caused by a penetrative property of hydrophobic carbon chain of the compuound into a plasma membrane as well as by additional interaction of membrane elements and a hydrophilic amphipathic compound head. Bactericidal and fungicidal activity of this compound strongly depends on chemical environmental factors. In general, microorganisms are not as sensitive in a full medium as in a minimal one and the level of sensitivity rises when the amphipatic compounds are presend in destilled water. Similarly, the sensitivity is stronger in fluid than on solid medium. Our researches revealed however that some aminoacids, although they are complex organic compounds, increase the microbial sensitivity to some tested compound. This efect depends on a microorganism and on a kind of compound. The highest hipersensitivity has been observed against yeast-like fungi when arginine was a cooperating aminoacid. The effect concerns Trichosporon but not E.coli, not occurs in relation to SDS, quaternary ammonium salt IA, and bisammonium salts. Certainly the effect exhibit QAS, which have simple composition of hydrophilic „head” consisting only of methyl group, attaching to alkilic chain possessing keton group, build of 14 or 16 carbon atoms.

2

Studies on the microbial corrosion inhibitors with sulfonyl groups

86%

Zakrzewski A., Janota H.

Pestycydy

|

2004

|

nr 1-2

41-49

3

Effect of different drying conditions for the viability of Candida albicans present on carriers

86%

Rohm-Rodowald E., Chojecka A., Jakimiak B., Wiercinska O., Ziemba B., Kanclerski K.

Roczniki Państwowego Zakładu Higieny

|

2014

|

tom 65

|

nr 1

Background. Problems in substantial under recovery of Pseudomonas aeruginosa and Candida albicans from carriers have been demonstrated for laboratories performing phase 2, step 2 efficacy tests on disinfectants relative to levels required by the EN 13697 standard. It was thus necessary to determine recoveries of these microorganisms following procedural losses incurred during drying and to optimise drying conditions such that recoveries then complied with the standard. Objectives. The aim of the study was to establish optimal drying conditions for the recovery of Candida albicans ATCC 10231 from carriers. Materials and Methods. The evaluation was performed according to the EN 13697:2001 standard procedure. A test suspension of Candida albicans and interfering substance were inoculated onto the surface of carriers (2 cm diameter stainless steel discs) and then dried under different conditions consisting of: a 37°C incubation with and without an incubator fan as well as at 23°C (room temperature) in a laminar air flow cabinet. Carriers were dried until the surfaces appeared visibly dry and the number of surviving organisms then recovered from the surface were quantified. The following were calculated for colony forming units (cfu); N (log10 cfu in a 0.05 ml test suspension), NC (the control log10 cfu in neutralizing medium), Nts (cfu numbers remaining on the surface) and the N-NC difference which should not exceed 2 log10 when microorganism recoveries are adequate and without any toxicity effects of the neutralising medium. Experiments was conducted using validating procedure (NC) which is performed with distilled water. Results. Drying at 37°C adversely affected the survival of Candida albicans and prevented the levels of microbial recovery from carriers to reach those specified by the EN 13697 standard. However, drying at around room temperatures of 23°C reduced Candida albicans mortality and increased recoveries from the carrier to levels compliant with the standard, where the N-NC differences were not greater than 2 log10. Conclusions. The viability of Candida albicans ATCC 10231 is sufficiently improved when carriers are dried at 23°C, even if the drying time exceeds 60 minutes. The density of the initial test suspension (N) should also be increased.

4

Fungicidal evaluation of substituted 4-(1,3,4-thiadiazol-2-yl) benzene-1,3-diols

86%

Niewiadomy A., Matysiak J.

Pestycydy

|

2010

|

nr 1-4

Fungicidal properties of 4-(1,3,4-thiadiazol-2-yl)benzene-1,3-diols set under in vitro conditions against five phytopathogenic fungi have been evaluated. The substitution panel includes amino-, alkyl-, alkoxyl-, aryl- and heteroarylderivatives. The most active compound with the benzyl substituent exhibits fungistatic effects amounting to 90-100% with the concentration of 20 μg mL-1 against R. solani, similar to the standard fungicides. The derivatives with amine moiety generally display lower activity than other analogues. F. culmorum seems to be the most refractory fungus compared to studied compounds. The influence of substitution of C-5 at the constant fragment at C-2 of 1,3,4-thiadiazole ring on the antifungal effect is discussed. To explain differences in the activity the quantum-chemical calculations were made.

5

Oddzialywanie mieszanych kultur bakterii fermentacji propionowej i mlekowej na grzyby patogeniczne

86%

Gwiazdowski R., Gwiazdowska D.

Progress in Plant Protection

|

2008

|

tom 48

|

nr 2

719-723

6

Copper alkylbenzenesulfonate - tests of fungicidal activity

86%

Ptaszkowska J., Malinski Z. T.

Pestycydy

|

1999

|

nr 4

7

Biological activity of new diarylalkenes

86%

Golebiewski W. M., Cieniecka-Roslonkiewicz A., Przybysz E., Ptaszkowska J., Szybinska A., Wilkowska E.

Pestycydy

|

1999

|

nr 3

8

Structure-activity relationship study for fungicidal activity of 1-(4-phenoxymethyl-2-phenyl-[1,3]dioxolan-2-ylmethyl)-1H-1,2,4-triazole derivatives against rice blast

72%

Hoshi T., Yamada K., Yoshizawa Y., Oh K.

Journal of Plant Protection Research

|

2015

|

tom 55

|

nr 4

To explore new antifungal agents for rice blast control, the antifungal activity of a series of novel 1,2,4-triazole derivatives against Magnaporthe oryzae has been evaluated. The antifungal activity was determined by using in vitro mycelial growth inhibition tests. Among the 19 test compounds, we found that the compound 1-(4-phenoxymethyl-2-phenyl-[1,3]dioxolan-2-ylmethyl)-1H-1,2,4- triazole (Gj) displayed potent antifungal activity against M. oryzae. The IC50 value was found approximately 3.8±0.5 μM and the IC50 value of propiconazole was found to be approximately 3.7±0.2 μM, respectively. Structure-activity relationship studies on aromatic ring structures provided insight and information about the structural requirements for antifungal activity of this synthetic series against M. oryzae.

9

Evaluation of fungicidal properties of post-cultured liquid medium from the culture of Kombucha microorganisms against selected mold fungi

72%

Batlej I., Andres B.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

|

2019

|

tom 107

10

Studies on in vitro activity of picoxystrobin and its mixtures with other fungicides against Ramulispora herpotrichoides and Ramulispora acuformis

72%

Malinski Z. T.

Pestycydy

|

2008

|

nr 1-2

75-85

The activity of picoxystrobin and its mixtures with standard fungicides against isolates of eyespot cereal disease agents was estimated in laboratory in vitro tests. The tested Ramulispora herpotrichoides and R. acuformis isolates differed in response to carbendazim. Picoxystrobin at concentration from 0.05 to 50 mg/L not totally inhibited the mycelium growth of tested pathogens on PDA medium. But carbendazim sensitive R. herpotrichoides isolates were a little more susceptible to strobilurin derivate than carbendazim resistant R. herpotrichoides isolate and R. acuformis strains. The effect of picoxystrobin at concentration 0.5 mg/L as partner in mixture with standard fungicide at concentration 0.1 mg/L (carbendazim, prochloraz or cyprodinil) was assessed as the additive. It was relatively most noticeably in tests with R. acuformis and picoxystrobin plus cyprodinil mixture that was for mixture recommended as tank-mix or as manufacture product.

11

Assessment of nanosilver particles fungicidal activity toward Candida spp. isolated from the feet of adult human carriers

72%

Chmielowiec-Korzeniowska A., Dobrowolska M., Tymczyna L., Banach M., Wlazlo L., Trawinska B., Pyrz M.

|

2016

|

tom 34

|

nr 4

12

Pre-sowing seed treatment nanotechnology with environment-friendly nanotube-based nanochips

72%

Karpachev V. V., Spiridonov J. J., Voropaeva N. L., Tkachev A. G., Shachnev N. V., Figovsky O. L.

International Letters of Natural Sciences

|

2016

|

tom 58

This particular study deals with the impact of pre-sowing nanotube-based seed treatment technology on rapeseed (Brassica napus) growth and yield. During field tests we identified a significant yield increase as a result of applying the pre-sowing nanotube-based seed treatment technology. The main treatment agents were physiologically active nanochips consisting of carrier matrix nanotubes with eliciting activity ("Taunit", "Taunit-M", "Taunit-MD", and graphene). Enriching nanochips with insecticide-fungicide Kruizer-rape for guaranteed seed protection from crucifer flea allowed to raise the yield up to 8.08 t / ha - 12.28 t / ha.

13

Comparative in vitro studies on liposomal formulations of amphotericin B and its derivative, N-methyl-N-D-fructosyl amphotericin B methyl ester [MFAME]

72%

Cybulska B., Kupczyk K., Szlinder-Richert J., Borowski E.

Acta Biochimica Polonica

|

2002

|

tom 49

|

nr 1

N-Methyl-W-D-fructosyl amphotericin B methyl ester (MFAME) is a semisynthetic derivative of the antifungal antibiotic amphotericin B (AMB). In contrast to the parent antibiotic, the derivative is characterised by low toxicity to mammalian cells and good solubility in water of its salts. Comparative studies on biological properties of free MFAME, AMB and their liposomal formulations were performed. To obtain liposomal forms, the antibiotics were incorporated into small unilamellar vesicles composed of dimyristoyl phos- phatidylcholine (DMPC) and DMPC: cholesterol or ergosterol, 8:2 molar ratio. The effectivity of the liposomal and free forms of AMB and MFAME were compared by determination of fungistatic and fungicidal activity against Candida albicans ATCC 10261, potassium release from erythrocytes, and haemolysis. The results obtained indicate that in contrast to AMB, incorporation of MFAME into liposomes did not further improve its selective toxicity. Studies on the antagonistic effect of ergosterol and cholesterol on the antifungal activity of the antibiotics indicated that sterol interference was definitely less pronounced in the case of MFAME than in the case of AMB.

14

The investigations of synthesis and properties of alpha-phenylsulphonylacetanilide derivatives

72%

Zakrzewski A., Janota H., Sadowski C.

Pestycydy

|

1999

|

nr 4

15

Synthesis and fungicidal activity of substituted isoxazolecarboxamides

58%

Gucma M., Golebiewski W., Michalczyk A.

Pestycydy

|

2010

|

nr 1-4

Several new 3-substituted isoxazolecarboxamides have been prepared from aromatic and aliphatic aldehydes. A key step was a 1,3-dipolar cycloaddition of nitrile oxides to ethyl acrylate or methacrylate esters. Some of the amides showed high fungicidal activities against Alternaria alternate, Botrytis cinerea, Rhizoctonia solani, Fusarium culmorum, and Phytophthora cactorum strains.

16

Wplyw zwiazkow strobilurynowych na rozwoj Melampsora epitea

58%

Wojdyla A. T.

Progress in Plant Protection

|

2008

|

tom 48

|

nr 2

548-551

17

Fungistatyczne oddzialywanie szczepu Bacillus coagulans w porownaniu z oddzialywaniem wybranych fungicydow

58%

Stachowiak B., Trojanowska K., Gulewicz K.

Progress in Plant Protection

|

2007

|

tom 47

|

nr 2

338-342

18

Jak dzialaja preparaty grzybobojcze

58%

Lawecki T.

Agrochemia

|

1995

|

nr 04

10-12

19

Wplyw metabolitow Propionibacterium na wzrost wybranych grzybow chorobotworczych i wytwarzanie mikotoksyn

58%

Gwiazdowska D., Gwiazdowski R., Czaczyk K.

Progress in Plant Protection

|

2006

|

tom 46

|

nr 2

543-547

20

Wplyw warunkow klimatycznych na poziom skutecznosci fungicydow w zwalczaniu zarazy ziemniaka [Phytophthora infestans]

58%

Kapsa J.

Progress in Plant Protection

|

2008

|

tom 48

|

nr 3

1063-1072

Ograniczanie wyników

Effect of aminoacids on the fungicidal activity of quaternary ammonium salts

Studies on the microbial corrosion inhibitors with sulfonyl groups

Effect of different drying conditions for the viability of Candida albicans present on carriers

Fungicidal evaluation of substituted 4-(1,3,4-thiadiazol-2-yl) benzene-1,3-diols

Oddzialywanie mieszanych kultur bakterii fermentacji propionowej i mlekowej na grzyby patogeniczne

Copper alkylbenzenesulfonate - tests of fungicidal activity

Biological activity of new diarylalkenes

Structure-activity relationship study for fungicidal activity of 1-(4-phenoxymethyl-2-phenyl-[1,3]dioxolan-2-ylmethyl)-1H-1,2,4-triazole derivatives against rice blast

Evaluation of fungicidal properties of post-cultured liquid medium from the culture of Kombucha microorganisms against selected mold fungi

Studies on in vitro activity of picoxystrobin and its mixtures with other fungicides against Ramulispora herpotrichoides and Ramulispora acuformis

Assessment of nanosilver particles fungicidal activity toward Candida spp. isolated from the feet of adult human carriers

Pre-sowing seed treatment nanotechnology with environment-friendly nanotube-based nanochips

Comparative in vitro studies on liposomal formulations of amphotericin B and its derivative, N-methyl-N-D-fructosyl amphotericin B methyl ester [MFAME]

The investigations of synthesis and properties of alpha-phenylsulphonylacetanilide derivatives

Synthesis and fungicidal activity of substituted isoxazolecarboxamides