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Start Over Coverage 139-142

2. Effect of 28-homobrassinolide treatment on nickel toxicity in Brassica juncea

Creator:
Masidur Alam, M., Hayat, S., Ali, B., and Ahmad, A.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
carbonic anhydrase, catalase, chlorophyll, leaf, nitrate reductase, peroxidase, proline, protein, root, and shoot
Language:
Multiple languages
Description:
Plants of Brassica juncea L. cv. T-59 were supplied with 50 or 100 µM nickel (Ni50, Ni100) at 10 d after sowing (DAS), and sprayed with 28-homobrassinolide (HBR) at 20 DAS. The plants treated with Ni alone exhibited reduced growth, net photosynthetic rate, content of chlorophyll, and the activities of nitrate reductase (E.C.1.6.6.1) and carbonic anhydrase (E.C. 4.2.1.1) at observed 40 DAS, whereas, the contents of peroxidase (PER), catalase (CAT), and proline were increased. However, the spray of HBR partially neutralized the toxic effect of Ni on most of the parameters. Moreover, the treatment of HBR in association with either of the Ni concentration boosted the contents of PER and CAT in leaves and that of proline both in leaves and roots. and M. Masidur Alam ... [et al.].
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Influence of insect-infested cotyledons on early seedling growth of Mongolian oak, Quercus mongolica

Creator:
Yi, X. F. and Zhang, Z. B.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Curculio, dry mass, leaf, leaf area, net photosynthetic rate, nitrogen content, photochemical efficiency, photosystem 2, plant height, root, and weevil
Language:
Multiple languages
Description:
Insect-infested (II) acorns germinated 3 d earlier than the healthy (H) ones. However, germination ratio of II-acorns was strongly decreased compared with H-acorns and there were great differences in activities of amylase. We found an apparently lower net photosynthetic rate and total chlorophyll contents of the first true leaf of II-acorns than of the H-ones. Maximal photochemical efficiency of photosystem 2 (PS2, Fv/Fm) decreased in seedlings germinated from II-acorns than from the H-ones. Infestation of insects, especially for weevil (Curculio spp.) had significantly negative effects on length of taproots, height of plants, dry mass (DM) of roots and the first fully expanded true leaf. Leaf area and total N content of the first true leaf declined due to limitation of resource reserves in cotyledons. Damage of cotyledons caused by weevil accounted much for poor development of seedlings germinated from II-acorns. A mutual relationship between seedling establishment and seed-infesting insects may exist due to high predation on H-acorns by small rodents. and X. F. Yi, Z. B. Zhang
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

6. Redescription of Ichthyofilaria argentinensis Incorvaia, 1999 (Nematoda: Philometridae) parasite of Merluccius hubbsi (Pisces: Merlucciidae) from Argentina

Creator:
Timi, Juan Tomás, Navone, Graciela Teresa, and Sardella, Norma Haydée
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Nematoda, Philometridae, Ichthyofilaria argentinensis, Merluccius hubbsi, and Argentina
Language:
English
Description:
Ichthyofilaria argentinensis Incorvaia, 1999 (Nematoda: Philometridae) is redescribed from type specimens and from parasites collected from the swim bladder of Argentine hakes Merluccius hubbsi Marini, 1933 caught at the Gulf of San Jorge (46°30'S, 66°30'W), Argentine Sea, in July, 1998. Sixteen out of 80 hakes (20%) were found to be parasitised by gravid females of this philometrid. After revision of both these nematodes and type material, the following differences from the original description of the species were observed: (a) cuticle with fine transverse striations, instead of smooth cuticle; (b) presence of cephalic papillae and a pair of amphids; (c) absence of swellings in the oesophagus; (d) oesophageal gland appendix very large and lobulate rather than small and vermiform, and (d) presence of vulva and vagina. The morphological features given in the redescription allow the confirmation of the identity of I. argentinensis as a valid species and to distinguish it from other members of the genus.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

7. Vliv lešticích nástrojů na střední prostorové frekvence při leštění asférických optických povrchů

Creator:
Procháska, František, Tomka, David, Špína, Michal, and Beneš, Jiří
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
mid-spatial frequencies, sub-aperture asphere polishing, střední prostorové frekvence, and sub-aperturní leštění asférických ploch
Language:
Czech
Description:
The work is focused on the testing of various commercially available polishing tools in terms of their impact on a surface structure specific area called MSF (mid spatial frequencies). For this purpose, a number of polishing experiments were carried out, the results of which were processed through the band pass filtering and PSD analysis and discussed from the perspective of the MSF behaviour in various steps of the polishing process and the ability to MSF suppress by given tools. and Práce je věnována testování různých komerčně dostupných lešticích nástrojů z hlediska jejich působení na specifickou oblast povrchových struktur označovanou jako střední prostorové frekvence (MSF). Za tímto účelem byla realizována řada lešticích experimentů, výsledky kterých byly zpracovány pomocí band pass filtrace a PSD analýzy, na jejichž základě je diskutováno chování MSF v různých krocích lešticího procesu a schopnost daných nástrojů MSF potlačovat.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public