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Abstract : A Weak form of Hadwiger's Conjecture
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Abstract: We introduce the following weak version of Hadwiger's conjecture: If Download Full Article |
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is a minor of Abstract : Propagation of Blue Honeysuckles (Lonicera caerulea L.) in In Vitro Culture
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Abstract: The aim of this study was to develop micropropagation protocol for Lonicera caerulea L. Clone 44, Clone 46 and Brązowa, three important invasive woody horticultural plants. Actively growing shoots from the shrubs grown in the field were used for initiation of culture. Shoots were surface sterilized with ethanol, then with sodium hypochlorite and mercury sulfate. MS medium supplemented with cytokinin BAP at concentrations of 1.0 - 4.0 mg·dm-3 had no statistically significant effect on the shoot initiation of selected blue honeysuckle genotypes. Multiplication rate varied depending on the genotype and plant growth regulator concentrations. The highest number of microshoots produced per explant of Clone 44 and Clone 46 was obtained at using 2.0 mg·dm-3 BAP, while of cultivar Brązowa – 1.0 mg·dm-3 BAP. Shoots were rooted in vitro in the presence of IBA and IAA. Microshoots have rooted differently depending on the treatment and genotype. In the case of Clone 4458% rooting was achieved at 2.5 mg·dm-3 IBA and MS basal nutrient medium treatment. Keywords: In vitro, Lonicera caerulea L., media, micropropagation, plant growth regulators.Download Full Article |
Abstract : A Comparative Study of Production Performance and Egg Quality Parameters of Naked-Neck and Indigenous Aseel Chicken of Pakistan
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Abstract: The present study was conducted to evaluate production performance and egg quality of four different varieties of native Aseel chicken in comparison with naked neck. A total of 105 adult chickens, 21 birds from each of four varieties of Aseel namely Lakha, Mushki, Peshawari and Mianwali, and 21 birds from naked neck, were maintained separately. The data of daily egg production, daily egg weight and weekly egg quality were calculated for up to ten weeks and analyzed under Completely Randomized Design (CRD) through SAS 9.1 software. Comparison among treatment means were made through Duncan’s Multiple Range (DMR) test. The results showed that egg production of Naked-neck (47.42) was significantly higher (P<0.05) than that of Mushki (34.08), Lakha (31.43), Mianwali (29.59) and Pesahwari (28.7). However,egg weight of Naked-neck (57.52) and Peshwari (55.65) was significantly greater (P<0.05) compared with lakha (54.03), Mushki (53.7) and Mianwali (51.62). Regarding egg quality traits, shell % of Peshawari (13.57) and Nakedneck (13.16) was significantly higher (P<0.05) than that of Lakha (11.89), Mushki (10.19) and Mianwali (9.36). Similarly, Haugh Unit Score of Naked-neck (82.76) and Peshawari (81.95) was significantly greater (P<0.05) than other varieties of Aseel. Albumen % was significantly higher in Mushki (61.83) variety (P<0.05) while yolk % was significantly higher in Mianwali (59.36) variety of Aseel (P<0.05) whereas yolk index showed non-significant (P>0.05) difference in Naked-neck and all varieties of Aseel. Keywords: Production performance, Egg quality, Genetic potential, Naked-neck, Aseel.Download Full Article |
Abstract : Capacity of the Nearby Infrared Spectroscopy (NIRS) Red for the Prediction of some Properties of Burned Soils in a Semi-Arid Area of Western Algeria
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Abstract: The forestry sector in Algeria is confronted for the years 1965 to a resurgence of the fires that destroy averaged 48 000 ha per year, or 12% of forest areas. As a result of repeated fires, a pyrophyte vegetation develops on degraded soils and from which the spontaneous regeneration of forest stands and reforestation are very difficult. The Algerian forest sustainable management must therefore be informed by an assessment of the physico-chemical quality of burned soils and the vulnerability of microbial activities in this disturbance Any rehabilitation or regeneration of the burned forest ecosystems program must take into consideration the impact of the fires on the ground [1] and therefore evaluate a large number of soil properties [2]. The main objective of this study was to evaluate the ability of spectroscopy in the near infra-red to predict the time since the last fire and burned some microbiological characteristics of soil. This study is interested in the pine forests of the Algerian semi arid floor Aleppo pines. Promising results have shown a prediction rather senssible of the time since the last fire. The advantages of the SPIR are many. This method is fast, inexpensive and non-destructive. Keywords: Fire, forest, vulnerability, soil, NIRS.Download Full Article |
