Ograniczanie wyników

Czasopisma help

  1. 3 Polish Journal of Food and Nutrition Sciences

  2. 2 Pestycydy

  3. 2 Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze

  4. 1 Acta Biochimica Polonica

  5. 1 Acta Parasitologica

Więcej...
Autorzy help

  1. 2 Wilczynska A.

  2. 1 Akhtari J.

  3. 1 Alborov A.

  4. 1 Ara J.

  5. 1 Asfaram S.

Więcej...
Lata help

  1. 1 2021

  2. 2 2020

  3. 1 2019

  4. 1 2017

  5. 2 2015

Więcej...
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 21

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  natural product
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Efficacy of natural formulations in bovine mastitis pathology: alternative solution to antibiotic treatment

100%
Pasca C., Marghitas L. A., Dezmirean D. S., Matei I. A., Bonta V., Pasca I., Chirila F., Cimpean A., Fit N. I.
Journal of Veterinary Research
|
2020
|
tom 64
|
nr 4
2

Gamma-lactones with potential biological activity

100%
Koziol A., Mroczko L., Niewiadomska M., Lochynski S.
Polish Journal of Natural Sciences
|
2017
|
tom 32
|
nr 3
γ-Lactones are well known organic compounds. They can be isolated from many different plants, e.g. from Asteraceae (Compositae) family. They are used as active ingredients of various medicinal herbs and exhibit a variety of biological activities, i.e. antiviral, antibacterial, anticancer, antimalarial, anti-inflammatory and others. Among described compounds vernolide (7) is characterized by high antimicrobial activity; epoxy compounds like glaucolide (13) and hirsutinolide (24, 25, 26) possess high anticancer activity. Other noteworthy γ-lactone is vernopicrin (14) that shows antimalarial activity. Some of the γ-lactones possess interesting aromatic and flavon properties, which make them desirable ingredients in perfumery and food industry. Further studies to determine relationship between properties and complex composition are caused by diversity of structures and potential activities of γ-lactones. It can be used to design new analogues with interesting pharmacological, flavon and olfactory properties. This paper reviews selected studies concerning γ-lactones and their various biological activities.
3

Promising anti-protozoan activities of propolis (bee glue) as natural product: a review

86%
Asfaram S., Fakhar M., Keighobadi M., Akhtari J.
Acta Parasitologica
|
2021
|
tom 66
|
nr 1
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Bioactive compounds from marine invertebrates for potential medicines - an overview

86%
Datta D., Talapatra S. N., Swarnakar S.
International Letters of Natural Sciences
|
2015
|
tom 07
The present review deals with the bioactive compounds of the marine non-chordates. The potent medicinal usage of the bioactive compounds viz. steroids, terpenoids, isoprenoid and non-isoprenoid compounds, quinones, brominated compounds, nitrogen heterocyclics and nitrogen-sulphur heterocyclics from marine non-chordates have been compiled. Various literatures survey revealed that the bioactive compounds isolated in recent past from the marine poriferans, cnidarians, annelids, arthropods, molluscs and echinoderms could be rich sources of therapeutic agents having antibacterial, antiinflamatory, anticarcinogenic properties. In overall, the present study will be benefitted to know global drug discovery researches on bioactive compounds from marine organisms for students, scholars, scientists, pharmaceutical sector, and government regulating authorities as new challenging technology in clinical applications through medicines.
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Twenty five years of azadirachtins (1986-2011)

72%
Hummel H. E., Hein D. F., Ley S. V., Morgan E. D., Kraus W., Schmutterer H.
Pestycydy
|
2011
|
nr 1-4
Azadirachtins are known as phagorepellent natural products from seeds of the neem tree Azadirachta indica A. Juss (Meliaceae), which impede the development of larval insects and sterilize adults. The labors of the past three decades ultimatively lead to a chemical structure, which has been unanimously but independently elaborated by German, British and American authors. This structure is in force ever since 1985/87 and was ultimately confirmed by Veitch & al. in Ley’s group in Cambridge, England, through total synthesis. Its 25th birthday is presently being celebrated. Marrangin (=Azadirachtin L) was discovered in Gießen and chemically identified by Kalinowski and colleagues. It occurs in seeds of the marrango tree, Azadirachta excelsa (Jack) Jacobs. In some insect species but also in mites like Tetranychus urticae, its biological activity is significantly superior to azadirachtin A. The value of these biorational compounds, with their very low vertebrate toxicity, and their low toxicity today is globally recognized. Quite recently, azadirachtin and analogues gain acceptance in veterinary and human medicine.
6

Quality assessment of apple juices and consumer acceptance thereof

72%
Kudelka W., Gluszek D.
Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze
|
2014
|
nr 2
7

Experimental studies of the dynamics of long-living luminous objects formed at conditions similar to the ones usual for observation of ball lightning in nature

72%
Golubnichy P., Krutov Y., Nikitin E., Kamenev S., Tsimbaluk A., Alborov A.
Teka Komisji Motoryzacji i Energetyki Rolnictwa
|
2010
|
tom 10A
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Dependence between the antimicrobial activity and the molecular structure of phenolic acids and their salts with alkali metals as biologically active substances present in the natural products

72%
Piekut J., Kowczyk-Sadowy M., Krasowska M.
Zeszyty Problemowe Postępów Nauk Rolniczych
|
2020
|
tom 601
9
Content available remote

Lycopene induces apoptosis by inhibiting nuclear translocation of beta-catenin in gastric cancer cells

72%
Kim M., Kim S. H., Lim J. W., Kim H.
Journal of Physiology and Pharmacology
|
2019
|
tom 70
|
nr 4
10

The Suzuki-Miyaura reaction in the chemical transformations of vindoline

72%
Ruszkowska J., Chrobak R., Zero P., Maurin J. K., Szawkalo J., Czarnocki Z.
Acta Biochimica Polonica
|
2007
|
tom 54
|
nr 4
857-861
Vindoline and its analogues are important constituents of the Madagascan periwinkle Catharanthus roseus, and some of them are valuable chemotherapy drugs used in treatment for some types of cancer, including leukaemia, lymphoma, breast and lung cancer. The search for semi-synthetic congeners of natural substances is still an important task for organic chemistry. In this communication we report the synthesis of five new vindoline derivatives, 15-(2-methoxyphenyl)vindoline 11, 15-(3-methoxyphenyl)vindoline 12, 15-(2-nitrophenyl)vindoline 13, 15-(3-cyanophenyl)vindoline 15, and 15-(4-cyanophenyl)vindoline 16 using the Suzuki-Miyaura reaction as the key step. X-Ray analysis of compound 16 is also reported
11

Effect of prometryn/benzoic acid combination on weeds, seed yield and yield components in lentil (Lens culinaris L.)

58%
Sharara F. A., El-Shahawy T. A., El-Rokiek K. G.
Electronic Journal of Polish Agricultural Universities. Series Agronomy
|
2011
|
tom 14
|
nr 1
12

The evaluation of quality of manuka honeys in comparison with Polish requirements

58%
Wilczynska A.
Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze
|
2013
|
nr 4
13

Surface compounds extruded by food and feed plants affect mitoses

58%
Zobel A. M., Zobel G., Schellenberger S. E.
Bromatologia i Chemia Toksykologiczna
|
2009
|
tom 42
|
nr 3
1067-1072
14

The effect of ursolic and oleanolic acids on human skin fibroblast cells

58%
Wojciak-Kosior M., Paduch R., Matysik-Wozniak A., Niedziela P., Donica H.
Folia Histochemica et Cytobiologica
|
2011
|
tom 49
|
nr 4
15
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Administration of Greek Royal Jelly produces fast response in neurotransmission of aged Wistar male rats

58%
Pyrzanowska J., Piechal A., Blecharz-Klin K., Joniec-Maciejak I., Graikou K., Chinou J., Widy-Tyszkiewicz E.
Journal of Pre-Clinical and Clinical Research
|
2015
|
tom 09
|
nr 2
Introduction. Royal Jelly (RJ) is a popular bee-derived product used widely in European and Asian traditional medicine. RJ has some pharmacological activities to support health and longevity as well as prevent ageing. Objectives. To evaluate whether a short-term 6-day Royal Jelly administration is able to induce behavioural and neurochemical effects in aged rats. Materials and method. RJ (previously chemically characterized by GC-FID and GC–MS) was given to 18-month-old male Wistar rats (100 and 500mg of powder/kg b.w./day) in subcutaneous injection for 6 days. Spatial memory was assessed in a water maze. Afterwards, the level of neurotransmitters, their metabolites and turnover in the selected brain regions were estimated by HPLC. Results. Short-term RJ administration did not change spatial memory in aged rats in the water maze, although it was sufficiently active to modify most of all the serotonergic and dopaminergic transmission in the prefrontal cortex and hippocampus. Conclusion. The obtained results indicate that Royal Jelly is able to affect very quickly the neurotransmission in the brain structures responsible for cognitive performance; however, short-term administration is not sufficient to exert behavioural consequences.
16
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Effect of fractions composition on biological activity of dietary fibre

58%
Gawecki J., Gorecka D.
Polish Journal of Food and Nutrition Sciences
|
1992
|
tom 01
|
nr 1
17
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Prevention of malignancies through nutrition

58%
Szponar L., Respondek W.
Polish Journal of Food and Nutrition Sciences
|
1996
|
tom 05
|
nr 1
There is a rather widespread view that inadequate composition of diet, with respect to the content of certain natural products and presence of foreign substances in food rations, is a very important factor contributing to the occurrence and development of certain neoplasms. The opinions on this problem show a constant evolution. This review tries to provide a picture of the present state of knowledge on the effects of natural food components on the occurrence of neoplasms.
18

Antibacterial activity of marine macro-algae from Karachi coast

58%
Ara J., Sultana V., Ehteshamul-Haque S., Athar M., Qasim R.
Bulletin of the Polish Academy of Sciences. Biological Sciences
|
2002
|
tom 50
|
nr 4
19

The importance of natural products in insect control

44%
Ujvary I.
Pestycydy
|
2005
|
nr 3
21-37
20
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Phenolic content and antioxidant activity of different types of Polish honey - A short report

44%
Wilczynska A.
Polish Journal of Food and Nutrition Sciences
|
2010
|
tom 60
|
nr 4
Thirty two samples of different types of Polish honeys were investigated in order to assess their total phenolic content by Folin-Ciocalteau method and their potential antioxidant activity by 1,1 diphenyl-2-picrylhydrazyl (DPPH) and ABTS methods. Results of the study showed that the total phenolic content and antioxidant activity differed widely among different honey types. The highest phenolic content and antioxidant activity had dark honeys, while the lowest antioxidant activity and phenolic content were found in pale honeys. Statistical analysis showed that the total phenolic content of honey was correlated with its antioxidant activity.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.