Papers by Naji Ebrahim
Micropropagation of Coffea arabica cvs. Oudayni, Hammady and Dawaeiry from Yemen were initiated f... more Micropropagation of Coffea arabica cvs. Oudayni, Hammady and Dawaeiry from Yemen were initiated from seeds. Seeds were surface sterilized and inoculated into media supplemented with different salt strengths and germinated under dark. Seeds germinated on agar medium gave high hypocotyl length, high root length and full cotyledonary leaves expansion after 120 days of culture. Proliferation of these cultivars was experimented on MS media supplemented with different levels (0.0, 2.0, 4.0. 6.0 or 8.0 mg lG) of 1 N6-Benzyladenine (BA), Thidiazuron (TDZ), 6-furfurylaminopurine (Kinetin), 6-(4-hydroxy-3-methyl-2butenylamino) purine (Zeatin) or 6-((,(-Dimethylallylamino) purine (2ip). Highest proliferation for all cultivars was obtained when BA was used at the highest level (8.0 mg lG). Satisfactory proliferation rate in the three 1 cultivars was achieved at 8.0 mg lG kinetin and 6.0 mg lG TDZ. Zeatin and 2ip were both failed to promote 1 1 proliferation at any used level. Rooting was experimented on half-strength MS media supplemented with different levels (0.0, 2.0, or 3.0 mg lG) of indole-3-butyric acid (IBA), indole-3-acetic acid (IAA) or 1 1-naphthaleneacetic acid (NAA). Highest root number and length was achieved at 3.0 mg lG IAA or IBA for 1 all cultivars. Rooted plantlets were transferred to 1 peat: 1 perlite mixture and ex vitro acclimatization gave 100% survival.
Maoa (Zafar) village near Dhamar. Dhamar is a city in south western Yemen. It is situated 100 Km ... more Maoa (Zafar) village near Dhamar. Dhamar is a city in south western Yemen. It is situated 100 Km to the south of Sana'a (capital of Yemen) 2700 m above sea level. It is located at 14°33'0 N 44°24'6 E Coordinates, at an elevation of around 2400 meters. Maoa (Zafar) is gaining importance as a archaeological and tourist village. Maoa (Zafar) residents complain the prevalence of colon cancer and drinking water may be is the reason, where drinking water samples are not treated before it is consumed. This study consisted of the determination of the trace metals and some physical and chemical parameters in drinking water samples from the Zafar village, Dhamar governorate. The analysis have been investigated by using Uv-Vis spectrophotometer, flame photometer and standard analytical methods. The data show that: the physical and chemical parameters and levels of the nitrogenous compounds are agreement with the standard values of the World Health Organization (WHO) but concentrati...
Maoa (Zafar) village near Dhamar. Dhamar is a city in south western Yemen. It is situated 100 Km ... more Maoa (Zafar) village near Dhamar. Dhamar is a city in south western Yemen. It is situated 100 Km to the south of Sana'a (capital of Yemen) 2700 m above sea level. It is located at 14°33'0 N 44°24'6 E Coordinates, at an elevation of around 2400 meters. Maoa (Zafar) is gaining importance as a archaeological and tourist village. Maoa (Zafar) residents complain the prevalence of colon cancer and drinking water may be is the reason, where drinking water samples are not treated before it is consumed. This study consisted of the determination of the trace metals and some physical and chemical parameters in drinking water samples from the Zafar village, Dhamar governorate. The analysis have been investigated by using Uv-Vis spectrophotometer, flame photometer and standard analytical methods. The data show that: the physical and chemical parameters and levels of the nitrogenous compounds are agreement with the standard values of the World Health Organization (WHO) but concentrati...
ISSN 2249-9679 Original Article Adenium obesum flower Extractaction and Application to synthesis of Silver Nanoparticles and Antioxidant
In this study environmentally friendly biosynthesis of sliver nanoparticles (AgNPs) using leaves ... more In this study environmentally friendly biosynthesis of sliver nanoparticles (AgNPs) using leaves extract of Adenium obesum have been achieved. AgNPs can be prepared with lower amounts of leaf extract in short time. Stable AgNPs were formed by treating solution using the plant leaf extracts as reducing agents. Biosynthesized nanoparticles were characterized by UV–V spectrophotometer. Also, this study aims to investigate and compare Adenium obesum L. extracts obtained in Ultrasonic condition with different water/methanol and water/ethanol extraction mixture acidified with 0.1% HCl. The extracts were analyzed for monomeric anthocyanins contents and antioxidant activities. The highest anthocyanins content (18340.9 mg/L) and the best free radical scavenging activity were obtained for the Adenium obesum extract with 100% methanol. Also, there is a good correlations between antioxidant activity (R2 = 0.9368) for water/ethanol series extracts.
Comparative study of anthocyanins content of some selected Yemeni plants
The aim of this study was to investigate and compare Malva rotundifolia, Hibiscus micranthus, Sca... more The aim of this study was to investigate and compare Malva rotundifolia, Hibiscus micranthus, Scadoxus multiflorus and Delonix regia extracts obtained in ultrasonic condition with different water/methanol and water/ ethanol extraction mixture acidified with 0.1% HCl. The extracts were analyzed for monomeric anthocyanins contents. The highest anthocyanin content was obtained from Malva rotundifolia (5372.l mg/l) followed by Scadoxus multiflorus, Hibiscus micranthus and Delonix regia (3787.86, 1659.4 and 1394.36 mg/l respectively). Methanol alcohol gave the highest anthocyanin content (3503.43 mg/l) as compared with ethanol (2603.81
Ethanol And Methanol Extracts of Flowers Of Mirabilis Jalab
The aim of this study was to investigate and compare Mirabilis jalab L. extracts obtained in Ultr... more The aim of this study was to investigate and compare Mirabilis jalab L. extracts obtained in Ultrasonic condition with different water/methanol and water/ethanol extraction mixture acidified with 0.1% HCl. The extracts were analyzed for monomeric anthocyanins contents and antioxidant activities. The highest anthocyanins content (3197.8 mg/L) and the best antioxidant activity were obtained for the Mirabilis jalab extract with 100% ethanol. Also, there is a good correlations between antioxidant activity (R 2 = 0.9332 and 0.9712) for water/ethanol and methanol series extracts respectively
Anti Oxidant Activity and Anthocyanin Content in Flower of Mirabilis Jalab L. Collected From Yemen
Banat's Journal of Biotechnology, 2013
In this study environmentally friendly biosynthesis of sliver nanoparticles (AgNPs) using leaves ... more In this study environmentally friendly biosynthesis of sliver nanoparticles (AgNPs) using leaves extract of Adenium obesum have been achieved. AgNPs can be prepared with lower amounts of leaf extract in short time. Stable AgNPs were formed by treating solution using the plant leaf extracts as reducing agents. Biosynthesized nanoparticles were characterized by UV-V spectrophotometer. Also, this study aims to investigate and compare Adenium obesum L. extracts obtained in Ultrasonic condition with different water/methanol and water/ethanol extraction mixture acidified with 0.1% HCl. The extracts were analyzed for monomeric anthocyanins contents and antioxidant activities. The highest anthocyanins content (18340.9 mg/L) and the best free radical scavenging activity were obtained for the Adenium obesum extract with 100% methanol. Also, there is a good correlations between antioxidant activity (R2 = 0.9368) for water/ethanol series extracts.
Maoa (Zafar) village near Dhamar. Dhamar is a city in south western Yemen. It is situated 100 Km ... more Maoa (Zafar) village near Dhamar. Dhamar is a city in south western Yemen. It is situated 100 Km to the south of Sana'a (capital of Yemen) 2700 m above sea level. It is located at 14°33'0 N 44°24'6 E Coordinates, at an elevation of around 2400 meters. Maoa (Zafar) is gaining importance as a archaeological and tourist village. Maoa (Zafar) residents complain the prevalence of colon cancer and drinking water may be is the reason, where drinking water samples are not treated before it is consumed. This study consisted of the determination of the trace metals and some physical and chemical parameters in drinking water samples from the Zafar village, Dhamar governorate. The analysis have been investigated by using Uv-Vis spectrophotometer, flame photometer and standard analytical methods. The data show that: the physical and chemical parameters and levels of the nitrogenous compounds are agreement with the standard values of the World Health Organization (WHO) but concentrations of all the metal elements and the metal ions are very below compared with the standard acceptable levels for drinking water.
Effect of Nitrogen and water on Wheat and Barley Root and Shoot Growth [Paperback] [2011] (Author) Naji Ebrahim
The aim of this study was to investigate and compare Malva rotundifolia, Hibiscus micranthus, Sca... more The aim of this study was to investigate and compare Malva rotundifolia, Hibiscus micranthus, Scadoxus multiflorus and Delonix regia extracts obtained in ultrasonic condition with different water/methanol and water/ ethanol extraction mixture acidified with 0.1% HCl. The extracts were analyzed for monomeric anthocyanins contents. The highest anthocyanin content was obtained from Malva rotundifolia (5372.l mg/l) followed by Scadoxus multiflorus, Hibiscus micranthus and Delonix regia (3787.86, 1659.4 and 1394.36 mg/l respectively). Methanol alcohol gave the highest anthocyanin content (3503.43 mg/l) as compared with ethanol (2603.81 mg/l).
The aim of this study was to investigate and compare Adenium obesum L. extracts obtained in Ultra... more The aim of this study was to investigate and compare Adenium obesum L. extracts obtained in Ultrasonic condition with different water/methanol and water/ethanol extraction mixture acidified with 0.1% HCl. The extracts were analyzed for monomeric anthocyanins contents and antioxidant activities. The highest anthocyanins content (18340.9 mg/L) and the best free radical scavenging activity were obtained for the Adenium obesum extract with 100% methanol. Also, there is a good correlations between antioxidant activity (R2 = 0.9368) for water/ethanol series extracts. Naji et al., (2013) Free radical scavenging activity and anthocyanin content
Micropropagation of Coffea arabica cvs. Oudayni, Hammady and Dawaeiry from Yemen were initiated f... more Micropropagation of Coffea arabica cvs. Oudayni, Hammady and Dawaeiry from Yemen were initiated from seeds. Seeds were surface sterilized and inoculated into media supplemented with different salt strengths and germinated under dark. Seeds germinated on agar medium gave high hypocotyl length, high root length and full cotyledonary leaves expansion after 120 days of culture. Proliferation of these cultivars was experimented on MS media supplemented with different levels (0.0, 2.0, 4.0. 6.0 or 8.0 mg lG ) of 1 N6-Benzyladenine (BA), Thidiazuron (TDZ), 6-furfurylaminopurine (Kinetin), 6-(4-hydroxy-3-methyl-2butenylamino) purine (Zeatin) or 6-((,(-Dimethylallylamino) purine (2ip). Highest proliferation for all cultivars was obtained when BA was used at the highest level (8.0 mg lG ). Satisfactory proliferation rate in the three 1 cultivars was achieved at 8.0 mg lG kinetin and 6.0 mg lG TDZ. Zeatin and 2ip were both failed to promote 1 1 proliferation at any used level. Rooting was experimented on half-strength MS media supplemented with different levels (0.0, 2.0, or 3.0 mg lG ) of indole-3-butyric acid (IBA), indole-3-acetic acid (IAA) or 1 1-naphthaleneacetic acid (NAA). Highest root number and length was achieved at 3.0 mg lG IAA or IBA for 1 all cultivars. Rooted plantlets were transferred to 1 peat: 1 perlite mixture and ex vitro acclimatization gave 100% survival.
Associate Proff of Medicinal Plants , Plant Physiology and PLant Tissue Culture
Conference Presentations by Naji Ebrahim
Thesis Chapters by Naji Ebrahim
Root and shoot growth, root-shoot partitioning, water and nitrogen use efficiency of durum wheat ... more Root and shoot growth, root-shoot partitioning, water and nitrogen use efficiency of durum wheat (Triticum turgidum var durum L.) and barley (Hordeum vulgare L.) were investigated in this study at the University of Jordan, Faculty of Agriculture Research Station at Jubeiha (32.02° N, 35.87° E, 980 m altitude) during 2005/2006 season. Wheat and barley were subjected to two water treatments (nonstressed and stressed regimes of 30% and 70% depletion of available water respectively)
Teaching Documents by Naji Ebrahim
post harvest physiology by Naji Ebrahim
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Papers by Naji Ebrahim
Conference Presentations by Naji Ebrahim
Thesis Chapters by Naji Ebrahim
Teaching Documents by Naji Ebrahim
post harvest physiology by Naji Ebrahim