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1

Technological complex technical providing removal fruits walnuts

100%

Sydorchuk A., Krupych S., Sydorchuk L.

Motrol. Motoryzacja i Energetyka Rolnictwa

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2017

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tom 19

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nr 3

2

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Effect of roasting on properties of walnuts

88%

Kita A., Figiel A.

Polish Journal of Food and Nutrition Sciences

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2007

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tom 57

|

nr 2[A]

89-94

The objective of this study was to compare properties of walnuts roasted at different technological parameters. Effects of roasting temperature (100-180oC), the roasting time (5-30 min) as well as the type of heating medium (hot air or boiled vegetable oil) on sensory and physical characteristics were determined. Experiment was conducted according to Response Surface Methodology. Nuts were analyzed for moisture content, colour, texture parameters, FFA and PV and sensory attributes. It has been stated that properties of walnuts were dependent on temperature and time of roasting. As roasting temperature and time increased nuts moisture decreased. Nuts roasted in oil showed darker colour than the samples treated in hot air. The colour changed and was getting darker together with higher roasting temperature and longer roasting time. Nuts roasted in oil exhibited harder texture than those roasted in hot air. As roasting temperature and time increased nuts texture was more crispy and delicate, independently on type of roasting. Roasting influenced the quality of nuts oil fraction – in all analysed samples FFA content increased, however PV increased mainly in nuts roasted in oil. Samples roasted at 130-150oC for 15-20 min exhibited the best sensory properties in both methods. Nuts roasted at lower temperatures showed too hard texture, light colour and taste and flavour typical of fresh nuts. Nuts roasted at the highest temperatures and for longer time were too dark and exhibited burned taste and flavour.

3

Comparison of two methods of walnut grafting

88%

Porebski S., Rzeznicka B., Poniedzialek W.

Journal of Fruit and Ornamental Plant Research

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2002

|

tom 10

4

Phenolic acids of walnut (Juglans regia L.)

75%

Chrzanowski G., Leszczynski B., Czerniewicz P., Sytykiewicz H., Matok H., Krzyzanowski R.

Herba Polonica

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2011

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tom 57

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nr 2

The chromatographic separations showed the presence of eleven free phenolic acids (trans-cinnamic, o-coumaric, p-coumaric, chlorogenic, ferulic, gallic, caffeic, p-hydroxybenzoic, syringic, tannic and vanillic) in the walnut tissues. The p-hydroxybenzoic acid was a predominant compound in the green husks (618.8 µg·g-1), though, high content of it was found in leaves obtained in July (478.3 µg·g-1). The content of chlorogenic acid in green husks of walnut (306.7 µg·g-1) was twice higher than that in the leaves obtained in July. Similar level of coumaric acids was determined in the leaves and green husks (o-coumaric: 42.4–48.2 µg·g-1; p-coumaric: 78.6–94.3 µg·g-1), though, o-coumaric acid was not found in May-leaves. Moreover, leaves of walnut possessed high content of caffeic acid (leaves obtained in May – 456.9; leaves obtained in July – 262.1 µg·g-1) and ferulic acid (leaves obtained in May – 93.5; leaves obtained in July – 292.5 µg·g-1). The predominant compound of the male inflorescences was vanillic acid (359.5 µg·g-1). The green husks of walnut were rich in polyphenolic acids, syringic (427.0 µg·g-1) and tannic (237.4 µg·g-1). However, the content of tannic acid was higher in the leaves - especially in leaves collected in May (350.7 µg·g-1). In tested tissues of walnut, gallic acid was found in the lowest concentration (male inflorescences – 32.7 µg·g-1and leaves obtained in July – 12.7 µg·g-1). In general, there was a great variation in a level of the phenolic acids between the studied organs of the walnut; nevertheless, walnut tissues are precious source of phenolic acids.

5

Lipid characteristics of walnuts [Juglans regia L.]

75%

Nowak-Polakowska H., Bojarska J. E., Czaplicki S., Lojko R.

Polish Journal of Natural Sciences

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2005

|

tom 18

187-198

6

Orthoamphisiella stramenticola nov. gen., nov. spec., a new hypotrichous ciliate (Ciliophora: Hypotrichida) occurring in walnut leaf litter

75%

Eigner P., Foissner W.

Acta Protozoologica

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1991

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tom 30

|

nr 2

7

Selection of promising walnut genotypes (Juglans regia L.) from Inner Anatolia

63%

Keles H., Akca Y., Ercisli S.

Acta Scientiarum Polonorum. Hortorum Cultus

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2014

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tom 13

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nr 3

Turkey is one of the most important walnut producers in the world. The aim of this study to select superior walnut genotypes among the walnut seedling populations naturally grown in Gumushacikoy district of Amasya province located in Inner Anatolia between 2010–2011 years. In the study, a large number walnut genotypes in Inner Anatolia were screened according to selection criteria and after evaluation twenty promising walnut genotypes were selected as cultivar candidate among genotypes. The average fruit weights, kernel weights and kernel ratios were ranged from 8.93 to 13.92 g, 4.62 to 7.36 g and 47.80 to 58.98% among twenty promising walnut genotypes, respectively. Measurements of fruit dimensions showed that the average fruit length, width and heights were found between 42.80–29.97 mm; 25.73–34.77 mm and 28.86–33.85 mm, respectively. Considering 20 promising walnut selections, 11, 5 and 4 genotypes had been found protandry, protogyny and homogamy. The chemical analyses showed that protein, crude oil and ash contents of selected twenty walnut genotypes were between 13.75–19.69%; 44.08– 70.81% and 1.53–2.15%, respectively.

8

Drying kinetics, water activity, shrinkage and texture of walnut kernels

63%

Figiel A., Kita A.

Acta Agrophysica

|

2008

|

tom 11

|

nr 1[156]

9

The effect of roasting on the texture of walnuts

63%

Kita A., Figiel A.

Acta Agrophysica

|

2006

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tom 07

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nr 1[132]

10

Extracts from selected tannin-rich foods - a relation between tannins content and sensory astringency

51%

Troszynska A., Narolewska O., Wolejszo A.

Polish Journal of Food and Nutrition Sciences

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2007

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tom 57

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nr 3

329-333

Extracts of polyphenols were obtained from black chokeberry, green tea, and walnut using acetone-water and ethanol-water system (8:2, v/v). The extracts were subjected to sensory evaluation using the method of sensory scaling and quantitative descriptive analysis (QDA). In sensory scaling a trained panel rated the samples for astringency which was expressed as Sensation of Astringency Coefficients (SAC). The QDA was applied for quantitative and qualitative characteristics of the extracts. To determine the content of tannins three spectrophotometric methods were used (n- butanol- HCl hydrolysis, BSA precipitation assay and PVP binding assay). The results proved that both the source of tannins and the type of solvent used for extraction had significant effects on the astringency and sensory profiles of the extracts. The analysis of multiple regression demonstrated that astringency of the extracts examined was affected to the greatest extent by tannins determined with the method of their binding on polyvinylpyrrolidone (PVP) sorbent.

11

Effect of callusing conditions on grafting success in walnut (Juglans regia L.)

51%

Paunovic S. M., Miletic R., Mitrovic M., Jankovic D.

Journal of Fruit and Ornamental Plant Research

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2011

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tom 19

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nr 2

This experimental study was conducted at the Fruit Research Institute, Cacak, Serbia, to determine bud break and callus formation dates, the degree of callus formation, grafting success on day 20 after grafting and overall grafting success on day 28 after grafting in walnut (Juglans regia L.) under different treatments and bench grafting conditions in cultivar Seinovo (control) and the selections 'Ovcar', 'G-286', 'Elit' and 'G-139'. Three treatments were applied: Treatment 1 - covering the graft with sawdust up to the top of the scion without dipping the scion and graft union in paraffin; Treatment 2 - covering the graft with sawdust up to the top of the scion and dipping the scion and graft union in paraffin; and Treatment 3 - covering the graft with both sawdust, up to the top of the scion, and polyethylene foil, and dipping the scion and graft union in paraffin. The best results of the parameters tested were obtained in the treatment involving dipping the graft in paraffin and covering it with both sawdust, up to the scion, and polyethylene foil. The treatment without the use of paraffin, involving only the covering with conifer sawdust up to the top of the scion yielded the poorest results.

12

Effect of phenolics from woody plants on activity of grain aphid oxidases

51%

Chrzanowski G., Leszczynski B., Sempruch C., Sytykiewicz H., Sprawka I.

Pestycydy

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2009

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nr 1-4

63-70

Changes in activity of the grain aphid peroxidase (Px) and polyphenol oxidase (PPO) towards phenolics isolated from leaves of black currant, sour cherry and walnut were examined. Slight increase in activity of peroxidase was found within insect tissues after 24 h of walnut extract treatment, whereas black currant and sour cherry strongly inhibited activity of this enzyme. Later on, the walnut extract reduced activity of the enzyme, finally about 30%. The other extracts showed slight changes in Px activity. The grain aphid’s polyphenol oxidase was stimulated during the first 24 h of the experiment. Further treatment with the phenolics extracts reduced activity of the grain aphid polyphenol oxidase. Generally, phenolics isolated from the black currant and sour cherry were more effective in reducing activity of the aphid peroxidase, whereas phenolics from walnut reduced the polyphenol oxidase activity. Possible application of the phenolics isolated from the woody plants as modern biopesticides towards the grain aphid is discussed.

13

Numerical strength dynamics of Chromaphis juglandicola (Kalt. 1843) on common walnut (Juglans regia L.) in Lublin town plantings

51%

Karczmarz K.

Acta Scientiarum Polonorum. Hortorum Cultus

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2010

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tom 09

|

nr 4

Common walnut has gained recognition in Poland as a tree decorating the space around us because of its habit and impressive leaves. More and more frequent use of walnut in the city landscape induced a more thorough analysis of the factor causing a significant decrease in the decorative values of this plant. The aim of this paper was to trace the numerical strength dynamics of Ch. juglandicola occupying the Juglans regia L. trees, referring to the weather conditions system and to determine the harmfulness degree of the above- mentioned plant louse species. Studies were conducted on walnut trees (Juglans regia L.) in Lublin in the years 2006–2008. Three stands in housing estate areas were selected for observation: (A) –a park estate of single-family houses (B) –in the University Campus area, and near the street (C) –at the crossroads of busy streets near the petrol station. The terms of occurrence of this plant louse, as well as the dynamics of its numerical strength were determined against the background of weather conditions. It was established that Chromaphis juglandicola (Kalt.) occurs on the Juglans regia L. trees growing in Lublin town plantings. It was reported that these plant lice occurred most numerously in the year 2007 on the housing estate post. Ch. juglandicola were observed at the bottom side of the leaf blade in dispersion. The terms of spring appearance and autumn disappearance of plant lice were significantly affected by the course of weather conditions. Their development was enhanced by warm spring with not very intense precipitation. However the air temperature above 30ºC and storm-like down pouring rain in summer limited the numerical strength of Ch. juglandicola.

14

Sterols and carboxylic acid-5-hydroxytryptamides in selected tree nuts

51%

Zahm A., Axel C., Speer K.

Polish Journal of Food and Nutrition Sciences

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2011

|

tom 61

|

nr Suppl.1

15

Modelowanie numeryczne surowców rolno-spożywczych na przykładzie owoców orzecha włoskiego (Juglans regia L.), orzechy podziemnej (Arachis hypogaea L.) i leszczyny pospolitej (Corylus avellana L.)

51%

Anders A., Kaliniewicz Z., Markowski P.

Acta Agrophysica

|

2018

|

tom 25

|

nr 1

Celem pracy było zbudowanie za pomocą skanera 3D modeli numerycznych owoców orzecha włoskiego bez okrywy zewnętrznej, orzechy podziemnej i leszczyny pospolitej, określenie cech geometrycznych owoców na podstawie tych modeli i porównanie z wynikami uzyskanymi za pomocą cyfrowej analizy obrazu, pomiarów suwmiarką oraz piknometrem cieczowym. Średnia masa owocu orzecha włoskiego jest większa od średniej masy owocu orzechy podziemnej o około 84% i od średniej masy owocu leszczyny pospolitej o około 83%. Na podstawie wyników uzyskanych po skanowaniu skanerem 3D wynika, że średnie pole powierzchni owocu orzecha włoskiego jest o 61% większe od średniego pola powierzchni owocu orzechy podziemnej i o 72% większe od średniego pola powierzchni owocu leszczyny pospolitej. Średnia objętość owocu orzecha włoskiego jest o 78% większa od średniej objętości owocu orzechy podziemnej i o 84% większa od średniej objętości owocu leszczyny pospolitej. Modele 3D owoców badanych gatunków uzyskane za pomocą skanera mogą służyć do analizy ich właściwości geometrycznych. Wykonane pomiary ukazują, że mierzenie długości, szerokości i grubości suwmiarką i skanerem 3D daje podobne wyniki, które nie różnią się istotnie od siebie przy założonym do obliczeń poziomie istotności α = 0,05. Wyniki pomiarów i obliczeń cech geometrycznych uzyskane na podstawie zdjęć badanych owoców orzechów różnią się istotnie w większości przypadków od wyników uzyskanych za pomocą suwmiarki oraz skanera 3D. Zbudowane modele numeryczne mogą zostać zarchiwizowane i w dowolnym momencie wykorzystane do dalszej analizy kształtu za pomocą odpowiedniego oprogramowania komputerowego.

16

Chemical composition of lignocellulose materials and porous structure of activated carbons

51%

Babel K., Janasik D., Waliszewska B., Pradzynski B.

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

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2012

|

tom 77

Chemical composition of lignocellulose materials and porous structure of activated carbons. Chemical and elemental compositions of selected lignocellulose materials were determined and next a series of activated carbons was produced from these materials under strictly repeatable conditions. The chemical activation method (900oC) using KOH (4:1) was applied for the development of the porous structure. Prior to activation all raw materials were subjected to pyrolysis at 700oC using a slight temperature increase rate (3oC/min). Produced activated carbons had varied porous structure parameters and considerable BET surface areas ranging from 2026 to 2884 m2/g. It was shown that the type of the applied precursor has a significant effect on the development of the porous structure.

17

The occurrence of Panaphis juglandis [Goetze] and Chromaphis juglandicola [Kalt.] on walnut under the urban conditions of Lublin

51%

Jaskiewicz B., Kmiec K.

Acta Scientiarum Polonorum. Hortorum Cultus

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2007

|

tom 06

|

nr 3

In the years 2003–2005 studies were conducted in the area of Lublin the aim of which was to study the population dynamics of aphids colonizing the trees of Juglans regia L. in the street and the park sites against the course of weather conditions. The weather in spring probably had no effect on the date of hatching of the larva of fundatrix, which was usually observed in the third 10-days’ period of May. On the other hand, the dry period, heat waves (above 30°C) and stormy rainfalls affected the break in the aphid population observed in July and August. The maximum population of P. juglandis was found in the second 10-days’ period of June, while that of Ch. juglandicola – at he turn of June and July. The highest number of P. juglandis was observed in 2004, while that of Ch. juglandicola in 2003. In 2003 the dominating species in both sites was Ch. juglandicola, while in the other years of studies it was P. juglandis.

18

Variability in soluble protein content in kernels of nuts obtained from different seedlings [Juglans regia L.]

51%

Sharma S. D.

Fruit Science Reports

|

1992

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tom 19

|

nr 2

19

Variability of the physico-mechanical properties of the ecotypes of nut fruits [Juglans regia L.] in Slovakia

51%

Rataj V., Brindza J.

International Agrophysics

|

1999

|

tom 13

|

nr 3

20

Wykrywanie wirusa liściozwoju czereśni w orzechu włoskim

45%

Cieslinska M., Hodun G.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

2010

|

tom 554

Jednym z ważnych gospodarczo patogenów orzecha włoskiego jest wirus liściozwoju czereśni (Cherry leaf roll virus, CLRV). Patogen jest sprawcą choroby objawiającej się nekrozą miejsca szczepienia podkładki z odmianą szlachetną oraz zamieraniem gałęzi i całych drzew. Próby liści zebrane z drzew różnych odmian i klonów orzecha włoskiego rosnących w kolekcji odmian Instytutu Sadownictwa i Kwiaciarstwa oraz uprawianych amatorsko w kilku rejonach kraju przetestowano na obecność CLRV przy użyciu metod ELISA i RT-PCR. W 13 spośród 30 badanych drzew orzecha włoskiego potwierdzono obecność wirusa testem ELISA przeprowadzonym w dwóch terminach - w czerwcu i w lipcu. Wyższe odczyty absorbancji w teście ELISA uzyskiwano w pierwszym z tych terminów. Wykazano przydatność techniki „one-step RT-PCR” do wykrywania CLRV w orzechu włoskim i większą czułość tej metody, w porównaniu z testem ELISA. Właściwości biologiczne siedmiu izolatów CLRV (O1, O2, O4, O6, O10, O14 i O15) określono na podstawie reakcji zielnych roślin różnicujących: Chenopodium quinoa, C. amaranticolor, Nicotiana clevelandii, N. benthamiana, N. tabacum ʻWhite Barley’ i ‘Samsun’ oraz Cucumis sativus. Izolaty CLRV różniły się pod względem właściwości biologicznych. Tylko dwa z nich (O1 i O2) wywoływały objawy na roślinach ogórka. Najwcześniej obserwowano symptomy po inokulacji N. tabacum izolatem O1, który ponadto wywoływał na roślinach tego gatunku silniejsze objawy chorobowe w porównaniu z objawami występującymi po zakażeniu pozostałymi izolatami.

Ograniczanie wyników

Technological complex technical providing removal fruits walnuts

Effect of roasting on properties of walnuts

Comparison of two methods of walnut grafting

Phenolic acids of walnut (Juglans regia L.)

Lipid characteristics of walnuts [Juglans regia L.]

Orthoamphisiella stramenticola nov. gen., nov. spec., a new hypotrichous ciliate (Ciliophora: Hypotrichida) occurring in walnut leaf litter

Selection of promising walnut genotypes (Juglans regia L.) from Inner Anatolia

Drying kinetics, water activity, shrinkage and texture of walnut kernels

The effect of roasting on the texture of walnuts

Extracts from selected tannin-rich foods - a relation between tannins content and sensory astringency

Effect of callusing conditions on grafting success in walnut (Juglans regia L.)

Effect of phenolics from woody plants on activity of grain aphid oxidases

Numerical strength dynamics of Chromaphis juglandicola (Kalt. 1843) on common walnut (Juglans regia L.) in Lublin town plantings

Sterols and carboxylic acid-5-hydroxytryptamides in selected tree nuts

Modelowanie numeryczne surowców rolno-spożywczych na przykładzie owoców orzecha włoskiego (Juglans regia L.), orzechy podziemnej (Arachis hypogaea L.) i leszczyny pospolitej (Corylus avellana L.)

Chemical composition of lignocellulose materials and porous structure of activated carbons

The occurrence of Panaphis juglandis [Goetze] and Chromaphis juglandicola [Kalt.] on walnut under the urban conditions of Lublin

Variability in soluble protein content in kernels of nuts obtained from different seedlings [Juglans regia L.]

Variability of the physico-mechanical properties of the ecotypes of nut fruits [Juglans regia L.] in Slovakia

Wykrywanie wirusa liściozwoju czereśni w orzechu włoskim