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DEVELOPMENT AND CHARACTERIZATION OF SURFACE DIELECTRIC BARRIER DISCHARGE-BASED REACTOR FOR OZONE PRODUCTION 基于表面介质阻挡放电的臭氧生产反应器的研制与表征
Pub Date : 2020-06-01 DOI: 10.21608/aunj.2020.220860
A. Abdelaziz, M. Abdel-Salam, Azza A. Hashim, A. Gehad, Hammad, Hyun-Ha Kim
The aim of this work is to develop an efficient plasma reactor for ozone production. The electrical characterization of the developed reactor, including the current-voltage waveform and the consumed power, is investigated at different reactor configurations (including ground-electrode width, number of electrodes, and volume of the reactor) and operating parameters (including the air flow rates and energy density). The performance of the developed reactor for ozone production is evaluated. It is observed that the consumed power increased linearly with increasing the ground-electrode width and the number of electrodes, while the reactor volume and the flow rates have no noticeable effect on the consumed power. It is also found that the increase of the plasma area by increasing the width of the ground electrode is preferable than its increase by increasing the number of electrodes. This is attributed to the decrease of the power loss in the dielectric material. In addition, an optimum size of the reactor is obtained, as the higher and the smaller ratio of the reactor volume to the plasma area are not efficient.
这项工作的目的是开发一种高效的等离子体反应器用于臭氧的生产。在不同的反应器配置(包括接地电极宽度、电极数量和反应器体积)和操作参数(包括空气流速和能量密度)下,研究了所开发反应器的电学特性,包括电流电压波形和消耗功率。对所研制的臭氧生产反应器的性能进行了评价。随着地电极宽度和电极数的增加,所消耗的功率呈线性增加,而反应器体积和流速对所消耗的功率影响不明显。通过增加接地电极的宽度来增加等离子体面积比通过增加电极的数量来增加等离子体面积更可取。这是由于介电材料的功率损耗降低了。此外,由于反应器体积与等离子体面积的比值过高或过小,效率不高,因此获得了反应器的最佳尺寸。
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引用次数: 0
AN IMPROVED LSB INVERSION IMAGE STEGANOGRAPHIC TECHNIQUE 一种改进的LSB反演图像隐写技术
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221103
Dalia NashatLoay Mamdouh
Data hiding is a major mechanism used for secure data transmission in computer networks. One of the most important branches in data hiding is Steganography. Steganography techniques concerns with hiding the secret data within the cover image in order to avoid detection. Least Significant Bit (LSB) technique is used widely in steganographic images. The traditional LSB method replaces some LSB of the cover image with the secret data. In this paper, a new method based on LSB for image steganography is presented. The goal of the proposed method is to increase the embedding capacity and enhance the stego image quality. We invert LSBs of the cover image depending on the value of the secret data. The experimental results of this study indicate that our method achieves high capacity and good imperceptibility quality of the stego image.
数据隐藏是计算机网络中用于数据安全传输的主要机制。隐写术是数据隐藏技术中最重要的分支之一。隐写技术涉及将秘密数据隐藏在封面图像中以避免被发现。最低有效位(LSB)技术在隐写图像中得到了广泛的应用。传统的LSB方法是用秘密数据替换封面图像的部分LSB。本文提出了一种基于LSB的图像隐写新方法。该方法的目的是增加嵌入容量,提高隐写图像的质量。我们根据秘密数据的值反演封面图像的lsb。实验结果表明,该方法对隐写图像具有高容量和良好的不可见性。
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引用次数: 0
PREPARATION AND CHARACTERIZATION OF CURCUMIN-LOADED IRON OXIDE NANOPARTICLES FOR BREAST CYTOTOXIC EFFECT 姜黄素氧化铁纳米颗粒乳腺细胞毒作用的制备与表征
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221110
M. Fathy, Lamiaa Nasser, G. El-Sokkary, S. Mahmoud, Rasheedy
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引用次数: 0
Samarium- 5-fluorouracil complex induces prominently the anticancer activity of human colon cancer cell line 钐- 5-氟尿嘧啶络合物对人结肠癌细胞系的抗癌活性有显著的诱导作用
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221113
N. A. Maali, Asmaa Y. Wahman, A. Aly, A. Nassar, M. Douaa, Sayed
In the present study samarium 5-fluorouracil (5-FU) complex was prepared to enhance the effectiveness of the 5-FU drug. This complex was characterized by UV/VIS spectrometry high performance liquid chromatography and differential scanning calorimetry. Furthermore, the antitumor effect of the prepared complex was explored on the human colon cancer cell Caco2 via evaluation of the cytotoxic activity of this complex through trypan blue cell viability. Apoptosis was also assessed through morphological changes, by Annexin V=PI flow cytometric analysis. The results revealed that the trivalent Sm enhance the 5-FU effect against the chemo-resistant colorectal carcinoma cell line.
本研究制备了5-氟尿嘧啶钐(5-FU)配合物,以提高5-FU药物的有效性。通过紫外/可见光谱法、高效液相色谱法和差示扫描量热法对该配合物进行了表征。进一步,通过台锥蓝细胞活性评价复合物的细胞毒活性,探讨复合物对人结肠癌细胞Caco2的抗肿瘤作用。Annexin V=PI流式细胞术分析细胞凋亡的形态学变化。结果表明,三价Sm可增强5-FU对化疗耐药结直肠癌细胞株的作用。
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引用次数: 0
VARIATIONS IN RESPONSE OF TWO PLANTS AND TWO MICROALGAL SPECIES TO THE DIFFERENT CONCENTRATIONS OF CEMENT KILN DUST 两种植物和两种微藻对不同浓度水泥窑粉尘的响应变化
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221117
E. S. Aldaby
Cement kiln dust (CKD) can use as fertilizer in agriculture and as media for algal growth. In this study, different concentrations of CKD (0.005, 0.01, 0.05, 0.1 and 0.5 gm.100 ml -1 ) used for plants crop growth, and (0.0001, 0.0005, 0.001, 0.005 and 0.01 gm.100 ml -1 ) concentrations of CKD for algal growth. The study shown that, the germination and growth of both faba beans (Vicia faba) and barley (Hordeum vulgare) improved by low concentrations (0.005 and 0.01 gm.100 ml -1 ) of CKD. Also, the concentration (0.001 gm.100 ml -1 ) of cement kiln dust can be used instead of the algal growth media (BG11) for Oscillatoria sp. and Chlorella sp. cultures.
水泥窑粉尘可以作为农业肥料和藻类生长的培养基。在本研究中,不同浓度的CKD(0.005、0.01、0.05、0.1和0.5 mg .100 ml -1)用于植物作物生长,不同浓度的CKD(0.0001、0.0005、0.001、0.005和0.01 mg .100 ml -1)用于藻类生长。研究表明,低浓度(0.005和0.01 mg .100 ml -1)的CKD促进了蚕豆(Vicia faba)和大麦(Hordeum vulgare)的萌发和生长。此外,水泥窑粉尘浓度(0.001 g .100 ml -1)可以代替藻类生长培养基(BG11)用于振荡藻和小球藻的培养。
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引用次数: 0
ULTRASTRUCTURAL STUDIES ON THE SENSILLA OF THE MOUTH PARTS AND ANTENNAE OF THE PRE-ADULT STAGES OF SITOPHILUS GRANARIUS (COLEOPTERA: CURCULIONIDAE) 粗腹象(鞘翅目:粗腹象科)成虫前期口部和触角的超微结构研究
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221129
N. M. Zohry
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引用次数: 0
ANATOMICAL, HISTOLOGICAL AND HISTOCHEMICAL STUDIES OF ORBITAL GLANDS OF LITTLE OWL ATHENE NOCTUA 小猫头鹰眼眶腺的解剖、组织学和组织化学研究
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221126
N. Shawki, F. Mahmoud, A. M. Abdel‐Mageed
The present study aimed to illustrate the anatomical, histological and histochemical structure of the two orbital glands of the little owl, Athene noctua with revealing their role in the vision. In little owl, the size of lacrimal gland appears smaller than that of the Harderian gland. The Harderian gland of the little owl is flat and looks like teardrop in shape with pink color and located between the ventralis oblique muscle and pyramidalis muscle. While, the lacrimal gland is cylindrical, compressed in the dorsal-ventral direction and is located on the dorsal edge of the orbit within a narrow elongated fossa. Both glands are compound tubuloalveolar type. The acini of Harderian gland are lined by cuboidal glandular cells whereas the lacrimal gland acini are lined by columnar cells. The Harderian gland in the little owl is classified as a type I. The Harderian gland and lacrimal glands of the little owl contain neutral and acid mucosubstances. INTRODUCTION
本研究旨在阐明小猫头鹰(Athene noctua)眼眶腺的解剖、组织学和组织化学结构,揭示其在视觉中的作用。小猫头鹰的泪腺比哈德氏腺小。小猫头鹰的哈德氏腺扁平,呈泪珠状,呈粉红色,位于腹斜肌和锥体肌之间。而泪腺呈圆柱形,在背腹方向受压,位于眶背缘狭窄的细长窝内。两腺体均为复合管状肺泡型。哈德氏腺腺泡由立方状腺细胞排列,而泪腺腺泡由柱状细胞排列。小猫头鹰的哈德氏腺属于i型。小猫头鹰的哈德氏腺和泪腺含有中性和酸性黏液物质。介绍
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引用次数: 2
ESTIMATION IN CONSTANT-STRESS PARTIALLY ACCELERATED LIFE TESTS FOR BURR TYPE XII USING TAMPERED RANDOM VARIABLE MODEL UNDER UNIFIED HYBRID CENSORING DATA 统一混合截尾数据下用篡改随机变量模型估计xii型毛刺恒应力部分加速寿命试验
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221105
A. Abd-Elrahman, A. E. Ahmad, Marwa A. Younis
This paper discusses constant stress partially accelerated life tests for unified hybrid censoring data from Burr type XII distribution with a tampered random variable. Both maximum likelihood and Bayesian methods are used to estimate the unknown population parameters and accelerated factor. In order to compute the asymptotic confidence intervals for the maximum likelihood estimators, we first calculate the Fisher information matrix related to the underlying model. On the other hand, Markov Chain Monte Carlo method under squared error loss function is used for obtaining the corresponding Bayesian estimators. In addition, a simulation study is carried out to compare the performances of the resulting estimators.
本文讨论了带有篡改随机变量的Burr型12型分布的统一混合截尾数据的恒应力部分加速寿命试验。采用极大似然法和贝叶斯法对未知总体参数和加速因子进行估计。为了计算最大似然估计的渐近置信区间,我们首先计算与底层模型相关的Fisher信息矩阵。另一方面,利用平方误差损失函数下的马尔可夫链蒙特卡罗方法得到相应的贝叶斯估计量。此外,还进行了仿真研究,比较了所得估计器的性能。
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引用次数: 0
CYPRIS POLYGONIAE N. SP. (OSTRACODA: CYPRIDIDAE) COLLECTED FROM WASTEWATER OF SEWAGE STATION, SOHAG, EGYPT. 从埃及索哈格污水站的污水中收集的塞蝇(介形目:塞蝇科)。
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221128
S. Ramadan, Ebtesam A. Yousef, A. M. Mohamed
A new species of freshwater Ostracoda Cypris polygoniae collected from El-cola wastewater of the sewage station at Sohag, Upper Egypt was described and identified. Among the specific characters, carapace ornamentation is divided into three areas (Thimble-like depression, polygonal reticulation, Smooth area). The first antenna bears 3 rows of fine hairs pseudochaetae on the first segment, one spine on the third segment and γ seta on the sixth segment. Second antenna has three rod-like processes, two swimming setae and rows of fine pseudochaetae hairs on its segments. Mandibula has number of weak teeth, rod-like processes, rows of fine hairs pseudochaetae and a pair of strong setae with small setules on its different regions. Maxillula has two rows of fine pseudochaetae hairs on the second segment of maxillular palp and two claws with 11 teeth on the endite. There are several numbers of rows of fine pseudochaetae hairs of the three thoracopods. Additionally, there are fan-like setae on the fourth segment and one chelated process on the fifth one of third thoracopod. Furca has two rows of fine spines on each uropodal ramus.
报道了从上埃及Sohag污水站El-cola污水中收集到的一种淡水介形虫(Ostracoda cyis polygoniae)。在具体特征中,甲壳纹饰分为三个区(顶针状凹陷区、多边形网状区、光滑区)。第一天线在第一节上有3排细毛,第三节上有一根棘,第六节上有γ根。第二个触角有三个杆状突起,两个游动的刚毛和成排的细假毛毛在其节上。下颌骨有若干弱齿,杆状突,成排的细毛,假毛纲和一对强壮的刚毛,不同区域有小刚毛。上颌骨在上颌骨的第二节上有两排细小的假毛毛,顶端有两个爪,有11颗牙齿。这三只胸足动物身上有几排细小的假毛毛。此外,第三胸足动物的第四节上有扇形刚毛,第五节上有一个螯合突。Furca在每个尾足分支上有两排细刺。
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引用次数: 0
AMELIORATIVE EFFECTS OF GALLIC ACID AGAINST OXIDATIVE STRESS IN ERYTHROCYTES INDUCED BY BPA IN MALE ALBINO RATS. 没食子酸对雄性白化大鼠双酚a诱导红细胞氧化应激的改善作用。
Pub Date : 2019-12-01 DOI: 10.21608/aunj.2019.221124
M. Al-Salahy, A. Mahmoud, S. Mahmoud, M. Saleh, F. Moustafa
Bisphenol A (BPA) is a chemical material that using in polycarbonate plastic that is widely used in daily life items. Several studies showed the adverse effect on the health of erythrocytes in both human and animals, while gallic acid (GA) is a known antioxidant capable of counteracting free radicals. In this study included 4 groups 10 rats each. The first was the control. The second received BPA in drinking water was given ad libitum at dose 40mg/kg.b.w. The third and fourth groups was given BPA by the same dose and by the same route in addition to receive GA in the diet at doses of 50 and 200 mg/kg.b.w, respectively. In erythrocytic hemolysate, the antioxidants: glutathione (GSH), activities of both superoxide dismutase (SOD) and catalase (CAT) were estimated. Also, lipid peroxidation (LPO) and carbonyl protein (CrPr) were determined. The results showed that BPA significantly increased LPO and CrPr and decreased the activities of CAT, SOD and the GSH content. However, the treatments of the BPA-intoxicated rats with GA reversed the erythrocytic oxidative damage and curtailed the decrease in antioxidants. In conclusion, the GA with both doses could attenuate the oxidative damage in erythrocytes of rats-treated with BPA.
双酚A (BPA)是一种用于聚碳酸酯塑料的化学物质,广泛应用于日常生活用品中。几项研究表明,没食子酸(GA)是一种已知的抗氧化剂,能够对抗自由基,对人类和动物的红细胞健康产生不利影响。实验分为4组,每组10只大鼠。首先是控制。第二组小鼠饮水中BPA的剂量为40mg/kg.b.w。第三组和第四组以相同的剂量和相同的途径给予BPA,另外在饮食中分别给予50和200毫克/公斤的GA。分别w。测定红细胞溶血中抗氧化剂谷胱甘肽(GSH)、超氧化物歧化酶(SOD)和过氧化氢酶(CAT)的活性。脂质过氧化(LPO)和羰基蛋白(CrPr)的测定。结果表明,BPA显著提高了LPO和CrPr,降低了CAT、SOD活性和GSH含量。然而,bpa中毒大鼠的GA治疗逆转了红细胞氧化损伤,并减少了抗氧化剂的减少。综上所述,两种剂量的GA均可减轻BPA处理大鼠红细胞的氧化损伤。
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引用次数: 1
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Assiut University Journal of Multidisciplinary Scientific Research
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