Two field experiments were carried out at the Research Farm of Nasser’s Faculty of Agricultural Sciences, University of Aden (Delta Tuban) Lahej Governorate, during two seasons 2017/2018 and 2018/2019, to study the effect of three sowing dates (6/11, 6/12 and 6/1) and three plant densities (56, 67 and 83 thousand plant/Ha) on the growth and yield characteristics of maize. The experiments were performed in split-plot design with three replications. The results could be summarized that the first sowing date (6 November), significantly surpassed, was higher in all growth traits compared to the late sowing date (6 January) in both seasons. The increase in plant density to 83 thousand plants/ha resulted in a significant increase in growth traits, except for stem diameter and leaf area which was decreased in both seasons. The interaction between sowing dates and plant density significantly affected all the studied traits.

This study was conducted in the laboratory of the Department of Food Science and Technology at Nasser's Faculty of Agricultural Sciences, University of Aden, during the year 2019 for investigating some physical and chemical propereities of three sesame cultivars (Ballady Red, Ballady White and Kod 94). The results showed that cultivar Kod 94 gave 50.29 % of Oil and (0.891 Gm /Cm3, 111.00 Gm oil/ 100 Gm) of oil compared with the two other cultivars (Ballady Red and Ballady white). Kod 94 was significant on iodine, and no effect seed wet, beroxide number, Acid number and saponification number) of the three cultivars.

This study was conducted on three cultivars of date palms (Jazaz, Socotrai and Barhi) grown in different environments, in the agricultural season 2020, in the Valley and Coast of Hadhramout Region, with the aim of comparing the physical characteristics of flowers and fruits among themselves, by studying some physical characteristics of flowers and fruits, The results were analyzed using a randomized complete sector design., the results obtained showed that the environment factor had an effect on the number of spathes, Number of flowers, Bunch stalk length, fruit length, fruit width, fruit weight and fruit size, It was found that Hadhramout Valley Region was significantly superior in the number of spathes, Number of flowers, Bunch stalk length, whereas the Hadhramout Coast Region was significantly superior in the fruit length, fruit width, fruit weight and fruit size, and the cultivar factor had an effect on the number of spathes, Number of flowers, Spikelet length, Bunch stalk length, fruit length, fruit weight and fruit size, where the Jazaz cultivar was significantly superior in Bunch stalk length, fruit length, fruit weight and fruit size, and Socotrai cultivar was significantly superior in the Number of flowers, Spikelet length, while Barhi cultivar was significantly superior in the number of spathes.

This study was conducted during the period 2020-2021 in Lawder district located at N12.55.663-45.50.793 and E12.54.692-45.49.617 and situated at an altitude of (800 to 2000m) above sea level. The topography of the study area consists of high and medium mountains altitudes. The regular rainfall helps to grow diverse plant vegetation. The local people are triply connected with their land and plants they are traditionally using in daily activities. The study results show that 40 species belong to 30 genius belonging to 22 family used for internal and external treatment as required.

The series of new pyrimidines derivatives 2- and 6- Substituted of 5 - Acetyl - 4 - (P- phenyl) Pyrimidine and Substituted thieno [2, 3- d] Pyrimidine are synthesis by the reaction between some substituted of benzaldehydes with ethyl aceto acetate in the present of ethanol as a solvent to give the products(3e-h), when react alkyl halide with (3e-h) in ethanol obtain new Pyrimidine derivatives(4e-h) heating them with phosphorous oxy chloride in dioxane to form (5e-h) which reacts with thiourea in ethanol to produce (6e-h) these compounds reacting with chloro acetic acid to form new Substituted thieno [2,3-d] Pyrimidine (8e-h). All the synthesized compounds of new pyrimidines derivatives are identified by the physical properties by it's melting points, colors and the yields are characterized by the elemental (CHN)analysis, IR, UV Spectrum.

Thyroid gland swellings are common clinical presentation of thyroid disorders of various etiologies, to which thyroidectomy is often carried out. The study aimed at analyzing demographic, clinical and pathologic features of patients with thyroid gland swellings, presented to 22 May Hospital and operated during the study period.as well as studying the types of operation used and their complications. This is a retrospective study. All patients who presented to 22 May Hospital from 1st March 2018 to 28th February 2020 and operated were included in the study. Patients with cervical lymphadenopathy, retrosternal goiter, and extrathyroidal tumor invasion were excluded from the study. Relevant data were collected and processed. For statistical analysis, SPSS software vs.17 was used. The Freeman and Halton extension of Fischer exact test was completed using Vassarstat. P-value of ≤0.05 was considered statistically significant. The study included 117 patients. Female preponderance was noted (91.5%). The average age group was 39.4 yrs, with SD ±13.8. Patients had an average duration of complain 50.3 months with SD ± 67.8. Most patients were euthyroid (88.1%) and had no previous thyroid operation (94%). The overall cancer detection rate on histopathology exam was 12% and papillary thyroid cancer was the most frequent histopathologiccancer type (92.8%). Statistically significant difference was found in the cancer detection rate in the different forms of thyroid swellings, the highest rate was found in solitary thyroid nodule (33.3%). Incidental thyroid cancer was found in 2.5% of the research population, but the histopathologic examination of their completed thyroidectomy specimen showed no cancer remnant. The total thyroidectomy was the most frequently practiced thyroidectomy procedure (45.8% of operations). No statistically significant difference was found in the major complications of thyroidectomy procedures of different resection extent. It could be concluded from this study that cancer detection rate in solitary thyroid nodule is significant, therefore, it needs to be carefully identified and investigated thoroughly.

The third most commonly injured region of abdomen is trauma, with surgery about 25% of civilian cases and more frequent in urban settings. The main objectives to study the distribution of abdominal trauma patients characteristics, surgical intervention and mortality. This is retrospective descriptive study for all patients undergoing a laparotomy at Al-Gamhoria Teaching Hospital, of whom 100 were presented abdominal trauma for in period from 2012 to 2015. Abdominal trauma were common among patients < 18 years, male with gunshot and prolong elapsed time between trauma and operation > 90 minutes. Complaining of abdominal pain with blood collection during operation were the most common findings.

Surgery is sometimes a necessary and inevitable solution because it is the only resort for healing, and surgical intervention is a routine matter for the medical staff, but it may be a terrifying specter for the patient, especially the one who undergoes it for the first time as a result of the physiological and biological imbalances that occur to the patient and as a result of the damage caused by it. This study aimed at measuring the death anxiety among patients who are about to undergo surgery. This is a descriptive study with (62) patients were admitted in the Surgical Department at Al-Gamhoria Teaching Hospital and \(22^{nd}\) May Hospital in Aden Governorate, who were targeted with a self-administered questionnaire applied for this purpose in the period from 22/06/2021 until 21/09/2021. Each questionnaire statement was given a weight (1: Yes, or 0: No) to estimate the significance of the statement, these weights are reflected in the levels of death anxiety, and for interpretation of the arithmetic means, the degree of presence of those levels were judged according to the following scale: (1- 16) degree is a weak level of death anxiety, (17- 33) degree is a moderate level of death anxiety, and (34- 50) degree there is a highly level of death anxiety. Around two thirds of the patients reported a moderate level of preoperative death anxiety. Death anxiety was reported more high by female patients, and those in the age group 60 and more, amongst illiterate and primary education patients, and with patients of gynecologic and orthopedic surgeries. In this study, the preoperative death anxiety was high among female patients, in the age group 60 and more, amongst illiterate and primary education patients, and with patients of gynecologic and orthopedic surgeries. The current study recommended that patients need to be assessed regularly for anxiety during the preoperative visit and appropriate anxiety reduction methods should be introduced through mental and psyche health professionals.

Glycine zinc sulfate (GZS) single crystals pure and doped with copper were grown by the slow evaporation of aqueous solutions at constant temperature (307 K). Cu/Zn molar ratios were 1%, 2% and 3% in the growth solutions. The optical reflectance was measured for pure and doped crystals (GZS:Cu) and it was used to calculate several optical and dielectric parameters. The direct optical band gap energy was found to be 5.44 eV for pure GZS crystal and it decreased as Cu/Zn molar ratio increased. The band tailing was studied for GZS:Cu crystals by using Urbach relation. The normal dispersion was investigated for GZS:Cu crystals by using both Wemplee–Di-Domenico and Cauchy-Sellmaier models. The real and imaginary parts of the complex dielectric constant of GZS:Cu crystals were calculated. Urbach parameters, normal dispersion parameters and dielectric parameters of GZS:Cu crystals were calculated in the present work for the first time. It was found that doping GZS crystal, with copper, affects the values of its optical and dielectric parameters and improves its electrical conduction.

Chitosan is a natural polymer that is very common in many applications. In addition, Nicotine is a natural dye. To prepared Chitosan Nicotine (CN) layer we mix (1: 1) ratios from the Chitosan doping with Nicotine dye. After that, it is used as an active layer in solar cells. The morphology of the surface for the prepared layer is studied by scanning electron microscopy technique (SEM). From this study, We found that the surface of Chitosan could be more regular when it dopant with Nicotine than being a lone. The optical properties of samples were studied from UV-Visible spectra at wavelengths 300-900 nm. The analysis of optical measurements data showed that the absorbance increased after mixing the Chitosan with Nicotine. The parameters of solar cell were calculated within the voltage range (1-12Volt) and noted that the Short Circuit Current (JSC =1.6x10-3) mA/cm2, Open Circuit Voltage (VOC =7x10-2) V, Fill Factor (FF=0.51), Series Resistance (RS= 60) Ω and Shunt Resistance (Rsh= 250) Ω.were noted.