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Phyllotactic pattern formation in early stages of cactus ontogeny

100%

Gola E. M.

Acta Societatis Botanicorum Poloniae

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2006

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tom 75

|

nr 4

271-279

Representatives of the family Cactaceae are characterized by a wide range of phyllotaxis. To assess the origin of this diversity, early stages of phyllotactic pattern formation were examined in seedlings. The analysis of the sequence of areole initiation revealed intertribal differences. In seedlings from the Trichocereeae (Gymnocalycium, Rebutia) and Notocacteae (Parodia) tribes, two opposite cotyledonal areoles developed as the first elements of a pattern. Usually, next pair of areoles was initiated perpendicularly to cotyledonal areoles, starting the decussate pattern. This pattern was subsequently transformed into bijugate or into simple spiral phyllotaxis. In seedlings from the Cacteae tribe (Mammillaria and Thelocactus), cotyledonal areoles were never observed and the first areoles always appeared in the space between cotyledons. It was either areole pair (mainly in Mammillaria), starting a decussate pattern, or a single areole (mainly in Thelocactus) quickly followed by areoles spirally arranged, usually in accordance with the main Fibonacci phyllotaxis. Differences in the initial stages of pattern formation do not fully explain the phyllotaxis diversity in mature cacti. Only two, the most common phyllotactic patterns occurred in the early development of studied seedlings, i.e. the main Fibonacci and the decussate pattern. Discrepancy in the range of phyllotactic spectra in seedlings and in mature plants suggests that phyllotaxis diversity emerges during further plant growth. Initial phyllotactic transformations, occurring already in the very early stages, indicate great plasticity of cactus growth and seem to support the hypothesis of the ontogenetic increase of phyllotaxis diversity due to transformations.

2

Vegetation of early stages of succession on sandy post-cultivated lands - selected examples

100%

Adamczak A.

Seria Biologiczna. Uniwersytet im. Adama Mickiewicza w Poznaniu

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2004

|

tom 69

3

Limitations of cyclosporine toxicity assessment in early stage after renal transplantation

100%

Marchewka Z., Kuzniar J., Dlugosz A., Krasnowski R., Zynek-Litwin M., Stoklosa A., Klinger M.

Acta Toxicologica

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2007

|

tom 15

|

nr 1

4

Early stages of trunk muscles development in a grass snake (Natrix natrix) L. (Reptilia, Colubridae)

84%

Lewandowski D., Posyniak E., Dubinska-Magiera M., Rupik W., Daczewska M.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2014

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tom 56

|

nr 1

5

Cytotoxicity of PP(Arg)2- and Hp(Arg)2-mediated photodynamic therapy and early stage of apoptosis induction in prostate carcinoma in vitro

84%

Nowak-Stepniowska A., Wiktorska K., Malecki M., Romiszewska A., Padzik-Graczyk A.

Acta Biochimica Polonica

|

2011

|

tom 58

|

nr 4

Porphyrin photosensitizers tend to localize in mitochondria. The depolarization of mitochondrial membrane is one of the early stages of apoptosis and Laser Scanning Fluorescence Microscopy allows to determine changes in transmembrane mitochondrial potential under influence of PDT depending on the kind of photosensitizer (PP(Arg)2, Hp(Arg)2), the energy dose (5, 10, 30 and 50 J/cm2) and time periods (24 and 48 hours after irradiation) in the LNCaP (lymphonodal metastasis of prostate carcinoma, the androgen dependent cell line). Cyototoxicity induced by PP(Arg)2- and Hp(Arg)2-based PDT depending on energy dose and time after irradiation in prostate carcinoma is determined with MTT. Generally, it was shown that lower energy doses induce greater changes in transmembrane mitochondrial potential. Hp(Arg)2-based PDT was more effective causing greater mitochondrial membrane depolarization and cell viability decrease in comparison to PP(Arg)2-mediated PDT (in the case of maximal nontoxic photosensitizer doses used).

6

Fluoride alters type I collagen expression in the early stages of odontogenesis

84%

Maciejewska I., Spodnik J. H., Domaradzka-Pytel B., Sidor-Kaczmarek J., Bereznowski Z.

Folia Morphologica

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2006

|

tom 65

|

nr 4

359-366

Fluoride alters the expression and post-translational modifications of extracellular matrix proteins in dentin. The aim of our study was to determine the effects of fluoride on type I collagen expression during the early stages of tooth germ development in rats. Pregnant dams were divided into three groups and fed a standard diet. From the fifth day of pregnancy the three groups received tap water with, respectively, trace amounts of fluoride (C), a low fluoride concentration (FL) or and a high fluoride concentration (FH). Changes in type I collagen expression and distribution were evaluated. The expression of type I collagen was restricted to the extracellular spaces of cells of mesenchymal origin. In the youngest animals the most intense immunoreactivity for type I collagen was detected in predentin of the FL group. Although the intensity of immunostaining increased in proportion to the age of the animals, the largest increase in the groups investigated was detected in the FL group. We concluded that a low concentration of fluoride can act as a stimulator of type I collagen deposition in the extracellular matrix of dentin, while high concentrations of fluoride have an opposite effect, acting as an inhibitor of type I collagen formation in dentin.

7

Architecture of the root system of potato cultivars grown in aeroponics

84%

Rykaczewska K., Zarzynska K., Boguszewska-Mankowska D.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2018

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tom 21

|

nr 1

8

A description of the early life history stages of Cheilochromis euchilus (Trewavas, 1935) (Pisces, Cichlidae) from Lake Malawi under laboratory condition

84%

Pawlak R., Wolczuk K.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2014

|

tom 56

|

nr 1

9

The embryo-suspensor in Sedum atratum L. (Crassulaceae): A developmental study using light and electron microscopy

84%

Czaplejewicz D., Kozieradzka-Kiszkurno M.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2014

|

tom 56

|

nr 1

10

The roles of the RAG1 and RAG2 'non-core' regions in V[D]J recombination and lymphocyte development

84%

Jones J. M., Simkus C.

Archivum Immunologiae et Therapiae Experimentalis

|

2009

|

tom 57

|

nr 2

105-116

11

Early stage development of IS-group isolates of Heterobasidion annosum on Abies alba roots - scanning electron microscopical studies

84%

Werner A., Lakomy P., Idzikowska K., Zadworny M.

Dendrobiology

|

2006

|

tom 55

57-63

The growth of hyphae and prepenetration phenomena on Abies alba roots after inoculation with the P-, S- and F-group isolates of Heterobasidion annosum were observed using scanning electron microscope. Elongated hyphae emanating from the inocula grew indiscriminately across and along root tips and entered the cortical cells randomly, while in subapical root areas they quite often grew along grooves at points of cell junctions. The ridges, folds and depressions seen on the root surface obviously directed the hyphal growth and their further entrance into roots through natural crevices or cracks. Although hyphae of all the isolates could penetrate the roots directly through small openings, the hyphae of the F isolate penetrated preferably more eroded and older parts of roots. A peculiar habit of the direct penetration, characterized by formation a structure resembling infection peg, was observed only after inoculation with the P and S isolates. It is suggested that specifically frequent penetration the roots in eroded areas by the hyphae of the F isolate may be one of the factors connecting with its lower pathogenic capabilities.

12

Do the asymmetry and the size of the structures of the temporal lobe persist in early stages of schizophrenia?

84%

Morys J. M., Dziewiatkowski J., Bobek-Billewicz B., Ratajczak I., Narkiewicz O., Morys J.

Folia Morphologica

|

2004

|

tom 63

|

nr 4

A total of 14 patients of various ages diagnosed with schizophrenia and, as an age-matched control group, 12 healthy subjects were examined using the MRI method of neuro-imaging. The volume of the following structures was evaluated in the right and left hemispheres: the superior temporal gyrus, the basolateral temporal area (the region including the middle temporal gyrus, inferior temporal gyrus and fusiform gyrus), the parahippocampal gyrus, the hippocampal head, the amygdaloid body and the inferior horn of the lateral ventricle. In schizophrenia a significant increase in the volume of the amygdaloid body on both the left and right sides was observed. In the patients, as in the control group, we noticed significant asymmetry between the left and right sides in the volume of the structures studied. The left amygdaloid body was significantly larger than the right, whereas the left hippocampal head and the temporal horn of the lateral ventricle were smaller than the right. Our findings suggest that in the early stages of schizophrenia, despite the increased volume of the amygdaloid body, the asymmetry between the structures of the temporal lobe is still present. However, the changes observed in the temporal lobe could be related to the functional disturbances observed in this disease.

13

The epimorphosis of a walking leg in the early stages of postembryogeny in Tegenaria atrica C.L.Koch [Arachnidae, Agelenidae]

84%

Jacunski L., Wisniewski H., Templin J.

Zeszyty Naukowe Wyższej Szkoły Pedagogicznej w Bydgoszczy. Studia Przyrodnicze

|

1994

|

tom 11

14

Mechanical properties of Phaseolus vulgaris L. seed covers during early stages of the germination process

84%

Gladyszewska B.

Annual Review of Agricultural Engineering

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2006

|

tom 05

15

Elevated expression of alpha7 neuronal nicotinic acetylcholine receptor during the early stages of damage by oxidative stress in the aging rat brain

67%

Dorszewska J., Rozycka A., Helias-Rodzewicz Z., Kempisty B., Grzelak T., Ziemnicka K., Oczkowska A., Steinborn B., Jagodzinski P.

Acta Neurobiologiae Experimentalis

|

2013

|

tom 73

|

nr 1

Aging is accompanied by a high level of oxidized form of guanine, 8-oxo-2’deoxyguanosine (8-oxo-2’dG), and decreased level of 8-oxoguanine glycosylase 1 (OGG1) in the brain. The development and progression of neurodegenerative disorders are also characterized by dysfunction or loss of the brain nicotinic acetylcholine receptors (nAChRs). To study whether the differences in nAChRs expression in the rat brain occur due to aging or oxidative stress we analyzed RNA and protein levels of α7, α4 and β2 subunits by RQ-PCR and Western blot validation in three brain structures: cerebral grey matter (CGM), sub-cortical white matter (SCWM) and cerebellum (Ce) of twenty one female Wistar rats. The first group consisted of five 3.0–3.5-month-old females, which was assigned as a young control group. The remaining sixteen females aged of 18–24 month were divided into three following groups: (1) aged control group of 5 rats; (2) a vehicle group of 5 rats which received intraperitoneal injections of deionized water; (3) memantine-treated group of 6 rats. In each group, the selected brain areas have also been analyzed to determinate the levels of oxidative stress. In this study, age- and stress- dependent differential RNA and protein expression levels were approved only in OGG1 and α7 nAChR proteins. In all analyzed brain structures of young and old controls, the levels of oxidized form of guanine were similar. Stress relevant to water injection increased the level of 8-oxo-2’dG in the cerebellum of old control rats (Ce, P<0.05). The old controls demonstrated an important reduction of OGG1 mRNA expression in CGM and Ce regions compared to young individuals (CGM P=0.03; Ce P=0.2). Western blot analysis has also revealed a reduction of OGG1 protein in the sub-cortical white matter of old individuals (SCWM, P=0.03). However, there was no important influence of water administration on OGG1 expression in all brain regions. In all analyzed brain structures, expression of α7 nAChR was down-regulated in old controls compared to young controls. However, this decrease was only significant in SCWM area (SCWM, P<0.05). Treatment with H2O caused a significant increase in RNA and protein levels of α7 nAChR in SCWM as compared to this brain structure of the aged control rats (SCWM, P<0.01). Our results suggest that aging of the rat brain is mostly associated with decreased expression of OGG1 as well as with deficit of α7 nAChR in the sub-cortical white matter. Stress relevant to water injection increases the level of 8-oxo-2’dG in the aging rat brain, but clearly overcomes the α7 nAChR deficit. A significant increase of the α7 nAChR expression in the SCWM of H2O-treated rats suggests that these receptors play an important role in compensatory mechanisms facilitating the impaired cholinergic neurotransmission following oxidative stress in the aging rat brain.

16

Oleic acid as a biomarker for early diagnosis of elevated blood levels of non-esterified fatty acids and beta-hydroxybutyric acid in the early stages of lactation in high-yielding Polish Holstein cows

67%

Puppel K., Solarczyk P., Kuczynska B., Madras-Majewska B.

Animal Science Papers and Reports

|

2017

|

tom 35

|

nr 4

Inappropriate doses and quality of dietary nutrients cause problems in providing the protein and energy balance in a feed ration. Especially, energy value of the feed ration poses many problems to dairy cattle breeders and particularly in the perinatal period, which results in increased incidence of metabolic disorders. These disorders are today one of the most frequent causes of culling of dairy cows, as they underlie most of the disease entities. The aim of this experiment was, therefore, to verify the hypothesis that oleic acid (OA) can be used as a biomarker for early diagnosis of elevated blood levels of non-esterified fatty acids (NEFAs) and β-hydroxybutyric acid (BHBA) in the early stages of lactation in high-yielding Polish Holstein (PHF) cows. The highest blood levels of NEFAs and BHBA of 1.573 and 1.116 mmolL⁻¹, respectively, was associated with the highest content of OA in milk fat. High concentrations of both NEFAs and BHBA, indicating explicitly the occurrence of the metabolic disease in cows, occur when the content of OA in milk exceeds 24g 100g⁻¹ of fat. Oleic acid may be used as a biomarker for the early diagnosis of elevated blood levels of NEFAs and BHBA in the early stages of lactation in high-yielding PHF cows.

17

The early stages of fungal succession in Pinus sylvestris phloem and sapwood infested by Tomicus piniperda

67%

Jankowiak R., Kurek M.

Dendrobiology

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2006

|

tom 56

27-36

Fungal invasion of Scots pine phloem and sapwood was investigated during a period of 15 weeks following attack by the pine shoot beetle, Tomicus piniperda (L.). The study was conducted in Mielec-Mościska, where the pine trees were heavily damaged by shot-feeding of T. piniperda. In order to determine the species richness and occurrence frequency of fungi associated with T. piniperda in temporal succession, living and trap trees infested by T. piniperda were used. Results revealed great diversity of fungi associated with T. piniperda, including 3758 cultures and 57 fungi species. The most important groups of fungi were the blue-stain fungi and molds, including mainly Penicillium, Trichoderma and Mucor genera. Among ophiostomatoid fungi, Ophiostoma minus and O. piceae were the dominant species. Occasionally isolated species were Leptographium lundbergii, L. procerum, L. wingfieldii, Graphium pycnocephalum and Graphium sp. ‘W’. Molds and pathogenic O. minus were the first invaders of both phloem and sapwood, however molds were more frequently isolated from phloem and sapwood at a depth of 5 mm. Ophiostoma piceae and L. lundbergii followed O. minus in the sapwood invasion. These species were successively replaced by L. wingfieldii, L. procerum and Graphium species in the later stages of fungal invasion in pine sapwood.

18

Preliminary studies on the quality and usability of wheat in early stages of kernel maturity

67%

Lysak J., Fornal L., Gambus H., Gruchala L., Panasik M., Pior H.

Polish Journal of Food and Nutrition Sciences

|

1996

|

tom 05

|

nr 4

Anticipating the wide possibilities of different applications of immature cereal grain, the examination of the samples of winter wheat grain, collected in 6 stages from flowering to wax maturity was carried out in 1993. It was found that the degree of the kernel's fulfillment and its biochemical state (mainly the state of carbohydrate and protein complexes) in 30-40 days after flowering was the most suitable for utilisation of immature grain in various applications.

19

Energy budget in early stages of smelt Osmerus eperlanus [L.]

67%

Maciejewska K., Opalinski K. W., Margonski P.

Bulletin of the Sea Fisheries Institute

|

2001

|

nr 2

20

Concentration of polysaccharides in spring triticale leaves duting the early stage of infestation with the grain aphid

59%

Chrzanowski G., Ciepiela A. P., Borsuk A.

Pestycydy

|

2005

|

nr 3

195-199

Ograniczanie wyników

Phyllotactic pattern formation in early stages of cactus ontogeny

Vegetation of early stages of succession on sandy post-cultivated lands - selected examples

Limitations of cyclosporine toxicity assessment in early stage after renal transplantation

Early stages of trunk muscles development in a grass snake (Natrix natrix) L. (Reptilia, Colubridae)

Cytotoxicity of PP(Arg)2- and Hp(Arg)2-mediated photodynamic therapy and early stage of apoptosis induction in prostate carcinoma in vitro

Fluoride alters type I collagen expression in the early stages of odontogenesis

Architecture of the root system of potato cultivars grown in aeroponics

A description of the early life history stages of Cheilochromis euchilus (Trewavas, 1935) (Pisces, Cichlidae) from Lake Malawi under laboratory condition

The embryo-suspensor in Sedum atratum L. (Crassulaceae): A developmental study using light and electron microscopy

The roles of the RAG1 and RAG2 'non-core' regions in V[D]J recombination and lymphocyte development

Early stage development of IS-group isolates of Heterobasidion annosum on Abies alba roots - scanning electron microscopical studies

Do the asymmetry and the size of the structures of the temporal lobe persist in early stages of schizophrenia?

The epimorphosis of a walking leg in the early stages of postembryogeny in Tegenaria atrica C.L.Koch [Arachnidae, Agelenidae]

Mechanical properties of Phaseolus vulgaris L. seed covers during early stages of the germination process

Elevated expression of alpha7 neuronal nicotinic acetylcholine receptor during the early stages of damage by oxidative stress in the aging rat brain

Oleic acid as a biomarker for early diagnosis of elevated blood levels of non-esterified fatty acids and beta-hydroxybutyric acid in the early stages of lactation in high-yielding Polish Holstein cows

The early stages of fungal succession in Pinus sylvestris phloem and sapwood infested by Tomicus piniperda

Preliminary studies on the quality and usability of wheat in early stages of kernel maturity

Energy budget in early stages of smelt Osmerus eperlanus [L.]

Concentration of polysaccharides in spring triticale leaves duting the early stage of infestation with the grain aphid