Tài liệu miễn phí Sinh học
Download Tài liệu học tập miễn phí Sinh học
Improving the productivity and quality of black cumin (Nigella sativa) by using Azotobacter as N2 biofertilizer
The effect of the crude oils of the produced black cumin seeds on some human pathogenic bacteria was studied. It was found that the crud fixed oil extracted from the seeds of plants has powerful antibacterial properties against this diverse genus of bacteria. However, the influence was different and depending on the tested bacterial strain.
4/5/2023 9:03:09 AM +00:00
A comparison study on the effect of some growth regulators on the nutrients content of maize plant under salinity conditions
In almost the same order, the Fe, Zn and Si toxicity due to the salinity effects on the leaves could be reduced. Cu and Mn deficiency might be controlled but to a limited extent by SA then by GA3. Silicon ions may compete for the Na+ ions and hence reduce their absorption by the maize plants.
4/5/2023 9:03:02 AM +00:00
The partial budget analysis for sorghum farm in Sinai Peninsula, Egypt
The results indicated that the marginal rate of return of changing from Treatment 1 (100 kg N/Feddan) to Treatment 2 (200 kg N/Feddan) was 9.61, and a changing from Treatment 2 (200 kg N/Feddan) to Treatment 3 (300 kg N/Feddan) gave marginal rate of return of 0.72, so Treatment 2 of (200 kg N/Feddan) was recommended.
4/5/2023 9:02:55 AM +00:00
Effect of citric acid, calcium lactate and low temperature prefreezing treatment on the quality of frozen strawberry
The precooling treatment did not show any enhancer affect in the quality indices of frozen berries. Compared to the other treatments, the use of 0.4% citric acid – 1% Ca lactate combination dip achieved better quality attributes, including reduction in drip loss and enhancement of firmness, retention of ascorbic acid and anthocyanin content in addition to improving in color attributes.
4/5/2023 9:02:42 AM +00:00
Total phenolic contents and antioxidant activities of various solvent extracts from whole wheat and bran
The results showed that the extraction solvents and wheat varieties significantly altered the total phenolics and antioxidant activity of whole wheat and bran, and 50% acetone is a recommended solvent for extracting phenolic compounds from the tested wheat and bran.
4/5/2023 9:02:36 AM +00:00
Charactrization of carotenoids (lyco-red) extracted from tomato peels and its uses as natural colorants and antioxidants of ice cream
The main component of carotenoids (lyco-red) extracted from tomato peels was lycopene, phytoene, phytofluene, b-carotene, cis-lycopene and lutein. Consequently, the higher stability of carotenoids (lyco-red) extracted from tomato peels was observed in alkaline pH ranging from 7 to 10 and temperature ranging from 40 to 70 C.
4/5/2023 9:02:29 AM +00:00
Fatty acid profile, antioxidant activity of various suggested chicken burger treatments
The aim of study was to use some plant wastes such as pea hulls, tomato peels, and wheat germ as well as carrot and rusk in processing of chicken burger to minimize cost of production and to produce burger with high nutritive value which could be exported to poorer regions especially in Africa.
4/5/2023 9:02:23 AM +00:00
Suggested treatments for processing high nutritive value chicken burger
The aim of the investigation is to utilize some plant wastes such as (pea hulls, tomato peels, and wheat germ) and other plant materials such as carrot and rusk as untraditional alternatives for making chicken burger in cheaper form (i.e. for minimizing production costs) which could be exported to poorer regions especially in Africa.
4/5/2023 9:02:16 AM +00:00
Effect of freezing on the pungency and antioxidants activity in leaves and bulbs of green onion in Giza 6 and Photon varieties
This study included leaves and bulbs in each varieties of spring onion. Results showed high contents of total phenols and flavonoids in leaves compared with bulbs either of Giza 6 or Photon types, therefore Giza 6 had high content of total phenols and flavonoids thanPhoton variety, in parallel the results were obtained of total chlorophyll and total carotenoids contents.
4/5/2023 9:02:04 AM +00:00
Microstructure and textural properties of Kareish cheese manufactured by various ways
Micrographs were shown contained (T1) and (T2) cheeses on cluster bacterial starter cells. Also, protein aggregates and voids were observed in micrographs of (T3) and (T4) cheeses made with rennet and different starter strains (not shown). Sensory evaluation showed that Kareish cheeses made with different starters and rennet were more accepted by the panellists than with starters only.
4/5/2023 9:01:54 AM +00:00
Hypolipidemic effect of fat spreads containing flaxseed oil
The hypolipidemic effect of fat spreads containing flaxseed oil (rich plant source of longchain omega-3 polyunsaturated fatty acid) represents the aim of the present study. Such effect was biologically evaluated through assessment of four biochemical parameters that reflect the blood serum lipid profile, namely total cholesterol, low- and high-density lipoproteins
4/5/2023 9:01:42 AM +00:00
Enhancement of quality attributes of canned pumpkin and pineapple
This study was carried out to produce and enhance sensory properties and nutritional value of canned pumpkin and pineapple and the effect after processing and storage on these products.
4/5/2023 9:01:35 AM +00:00
Evaluation of red pigment extracted from purple carrots and its utilization as antioxidant and natural food colorants
Anthocyanins derived from purple carrots were extracted, and identified by using HPLC. Extracted pigments from purple carrots are used as alternative natural red colorants for preparing hard candy and sweet jelly and also red carrot pigment used as natural antioxidant on sunflower oil to delay the rancidity of sunflower oil.
4/5/2023 9:01:28 AM +00:00
Anther culture response and salt tolerance in some wheat genotypes
The two crosses (Line-A · Misr-1 and Line-A · Gemmiza-11) with the highest response in multiple shoots had parent that exhibited very good response. The parental line (Line-A) and the cross (Line-A · Msir-1) produced the highest mean values (61.90 and 45.24, respectively) for salt tolerant index
4/5/2023 9:01:22 AM +00:00
Effect of ginger powder on the mayonnaise oxidative stability, rheological measurements, and sensory characteristics
The effect of different ginger powder (GP) concentrations ranged between 0% and 1.25% on oxidative stability, rheological, and sensory characteristics of mayonnaise were studied during 20 weeks storage period. The pH value significantly (P < 0.05) decreased with increasing storage period.
4/5/2023 9:01:15 AM +00:00
Taxonomic revision of genus Lemna L. (Lemnaceae Gray) in Egypt
This study was conducted to revise the taxonomic identity and clarify specific relationships within genus Lemna in Egypt. The studied species included: L. aequinoctialis Welw., L. gibba L., L. minor L., and L. trisulca L.
4/5/2023 9:01:09 AM +00:00
Improving growth of date palm plantlets grown under salt stress with yeast and amino acids applications
This work was done at Central Laboratory of Date Palm for Research and Development at Agriculture Research Centre (ARC), Egypt, to investigate the inversely effects of yeast (Saccharomyces cerevisiae 1 · 109 cells/ml) at 40 and 50 cm/l and amino acids at 3 and 6 cm/l on the bad expression of salinity at two levels 16,000 and 18,000 ppm NaCl + CaCl2 2: 1 by weight on the growth of date palm (Phoenix dactylifera L.) plantlets cv.
4/5/2023 9:01:01 AM +00:00
Genetically modified roundup ready soybean in processed meat products in the Kingdom of Saudi Arabia
This work was conducted to monitor the presence of Roundup Ready (RR) soybean in processed meat products in the Kingdom of Saudi Arabia (KSA). Seventy-two samples of processed meat products were collected from the Kingdom of Saudi Arabia (KSA) food market.
4/5/2023 9:00:54 AM +00:00
Grain yield response index of bread wheat cultivars as influenced by nitrogen levels
The obtained results showed significant differences among the tested wheat cultivars in the two seasons for number of spikes/m2 , spike length, kernels number/spike, kernels weight/spike, weight of 1000 kernels, and grain and straw yields/fad.
4/5/2023 9:00:47 AM +00:00
Biochemical evaluation of some faba bean cultivars under rainfed conditions at El-Sheikh Zuwayid
In this respect, the minimum values of such content were produced from milled seeds of all cultivars after treatment (soaking) with water, citric acid, sodium bicarbonate, and acetic acid as compared with the control.
4/5/2023 9:00:38 AM +00:00
Response of growth and forage yield of pearl millet (Pennisetum galucum) to nitrogen fertilization rates and cutting height
Two field experiments were conducted in the experimental station farm, faculty of agriculture, Ain Shams University at Shalakan, Kalubia Governorate, during the two growing seasons, i.e. 2009 and 2010, to investigate the response of growth and forage yield production of pearl millet cv. Shandaweel 1 to nitrogen fertilization rates and cutting height above the soil surface.
4/5/2023 9:00:32 AM +00:00
Effects of anti-coloring agents on blackening inhibition and maintaining physical and chemical quality of fresh-cut okra during storage
Reducing blackness was found parallel to decreasing phenolic content, indicating the role of the phenolic oxidation in the blackening process in okra pods during storage. Citric acid was less effective in enhancing the examined physical and chemical properties.
4/5/2023 9:00:25 AM +00:00
Effect of herbal beverages of Foeniculum vulgare and Cymbopogon proximus on inhibition of calcium oxalate renal crystals formation in rats
This study was carried out to produce new herbal beverages from Foeniculum vulgare and Cymbopogon proximus using for inhibiting or preventing calcium oxalate crystals formation. The preliminary chemical composition and phytochemical tests ofF. vulgare andC. proximushave been examined. Also, total polyphenols and total flavonoids contents were determined.
4/5/2023 9:00:17 AM +00:00
Isolation, identification and acclimatization of Atrazine-resistant soil bacteria
The present study aimed to isolate and identify and acclimatize Atrazine-resistant soil bacteria from different contaminated soils in order to be used for bioremediation of polluted environments.
4/5/2023 9:00:05 AM +00:00
Critical control points for preparing chicken meals in a hospital kitchen
Critical control points for preparing chicken meals in a hospital kitchenThe results stress the importance of the implementation of training for nutritionists and food handlers to prevent foodborne diseases. Hazard Analysis Critical Control Point (HACCP) system can be also use to control the safety and quality of prepared meals.
4/5/2023 8:59:54 AM +00:00
Age at puberty and fertility of rahmani sheep fed on biological inoculated corn silage
The present study aimed to investigate the effect of microbial inoculation adding to corn silage on productive and reproductive performance of sheep. The weaning male and female lambs were fed separately in four groups received a basal diet consisting of concentrate feed mixture (CFM) plus wheat straw (WS).
4/5/2023 8:59:48 AM +00:00
Effect of carrier materials, sterilization method, and storage temperature on survival and biological activities of Azotobacter chroococcum inoculant
Results revealed that non-sterile formulations exerted high numbers of total fungi and bacteria along the storage period; however, Az. chroococcum (A101) numbers were decreased over incubation time.
4/5/2023 8:59:40 AM +00:00
Molecular characterization of a cucumber mosaic cucumovirus isolated from lettuce in Egypt
Virus coat protein (CP) molecular weight was determined using sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS–PAGE), giving a single band of 25 kDa within resolving gel. Immunocapture-reverse transcriptase-polymerase chain reaction
4/5/2023 8:59:34 AM +00:00
Essential oils from some Egyptian aromatic plants as an antimicrobial agent and for prevention of potato virus Y transmission by aphids
Essential oils from different Egyptian aromatic plants (Mentha piperita, Ocimum basilicum, and Thymus vulgaris) were tested for their inhibitory effect on some selected harmful bacteria and yeast (Escerichia coli, Psedumonas aeruginosa, Staphylococcus aureus, Streptococcus pyogenes, and Candida albicans).
4/5/2023 8:59:23 AM +00:00
Utilization of watermelon rinds and sharlyn melon peels as a natural source of dietary fiber and antioxidants in cake
The aim of this work was to evaluate some physical and chemical properties of watermelon rind and sharlyn melon peel powders and its utilization as partially, substituted of wheat flour at levels of 2.5%, 5.0% and 7.5% or fat at levels of 5.0%, 10% and 15% in cake making.
4/5/2023 8:59:15 AM +00:00