An Analysis of Spatial Distribution Characteristics and Influential Factors of China's A-Level Logistics Enterprises
Issue:
Volume 2, Issue 2, December 2018
Pages:
20-25
Received:
7 August 2018
Accepted:
6 September 2018
Published:
10 October 2018
DOI:
10.11648/j.stpp.20180202.11
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Abstract: Logistics enterprise is an economic entity to specialize in organization and operation of logistics activities. In recent years, with the rapid and steady development of China's economy, the logistics industry has grown rapidly, and more and more logistics companies have transformed into A-level logistics enterprises. A-level logistics enterprises are the backbone of the logistics industry whose development level determines that of the logistics industry. Therefore, a correct understanding of the different patterns of logistics enterprise layout and the mechanism of comprehensive economic and industrial factors on the comprehensive role of A-level logistics enterprises will help all levels of government and logistics enterprises to achieve optimal layout of enterprises. Based on it, this paper obtains a list of national A-level logistics enterprises from the website of China Federation of Logistics and Purchasing. It draws pictures by using tableau software and analyze the layout characteristics of Chinese logistics enterprises from the provincial scale. Moreover, this paper uses multiple regression models from a quantitative perspective to study the influencing factors of the differences in the layout of A-level enterprises. Through the above research, we draw conclusions that the distribution of China's A-level logistics enterprises has obvious geographical differences. Most of them are located in the southeast coastal area. What’s more, it obtains a regression model between comprehensive economic strength factor, logistics demand level factor, infrastructure level factor and the number of A-level logistics enterprises, which can provide some reference for the layout optimization and logistics activities organization of Chinese logistics enterprises.
Abstract: Logistics enterprise is an economic entity to specialize in organization and operation of logistics activities. In recent years, with the rapid and steady development of China's economy, the logistics industry has grown rapidly, and more and more logistics companies have transformed into A-level logistics enterprises. A-level logistics enterprises ...
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Essential and Toxic Heavy Metals Status in Some Fruits from Turaba District (Saudi Arabia), Health Risk Assessment
Awad Abdalla Momen Abdelkareem,
Mohamed Hesham Hassan Mahmoud,
Dafaalla Mohamed Hag Ali,
Mohammed Awad Ali Khalid,
Saad Hmoud M. Alotaibi,
Malik Abdalla Abdelrahman Elsheikh
Issue:
Volume 2, Issue 2, December 2018
Pages:
26-37
Received:
29 August 2018
Accepted:
30 September 2018
Published:
9 November 2018
DOI:
10.11648/j.stpp.20180202.12
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Abstract: This study was carried out to determine the essential (Ca, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni and Zn) and the toxic heavy metals (Al, As, Cd and Pb) in fruit samples of commonly consumed in Turaba District, (Saudi Arabia). Samples were digested by microwave assisted reaction system using (3:1) HNO3:H2O2 mixture. The metals were analyzed by inductively coupled plasma-optical emission spectrometry (ICP-OES). Studied samples includes bananas (Musa acuminata), tomatoes (Solanum lycopersicum), guava (Psidium guajava), grapes (Vitis spp), date palm (Phoenix dactylifera), mangos (Mangifera indica), cantaloupe melon (Cucumis melo), watermelon (Citrullus lanatus), orange (Citrus maxima), mandarin (Citrus reticulata), lemon (Citrus limon) and pomegranate (Punica Granatum). The method was validated in terms of linearity, accuracy and precision, limit of detection (LOD) and limit of quantification (LOQ). The recovery (%) was found to be between 91.6–103.4%. It was found that Ca (~14.79 mg/kg), Mg (~10.46 mg/kg), Na (~6.327 mg/kg), K (~166.33 mg/kg) and Zn (2.85 mg/kg) were predominant among the major elements, while, Cr (~0.001 mg/kg), Cu (~0.147 mg/kg), Fe (~0.104 mg/kg) and Mn (~0.010 mg/kg) were comparable. The concentration of toxic heavy metals (Cd, Al, As and Pb) were mostly below LOD and they may not develop any health problems, while Co and Ni were not detected in all studied fruit samples. Moreover, the estimated concentrations of all metals in the present study were lower than the limits that permitted by Saudi Food and Drug Authority (SFDA) and World Health Organization (WHO). This is results is also confirmed by the estimated daily dietary elements intake (EDDEI) values. This indicate that, fruit types of commonly consumed in Turaba District and other parts in Saudi Arabia may not rises any health risk to consumers. Student's t-test, ANOVA test at 95% confidence interval and Microsoft excel were employed to estimate the significance of values obtained.
Abstract: This study was carried out to determine the essential (Ca, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni and Zn) and the toxic heavy metals (Al, As, Cd and Pb) in fruit samples of commonly consumed in Turaba District, (Saudi Arabia). Samples were digested by microwave assisted reaction system using (3:1) HNO3:H2O2 mixture. The metals were analyzed by inductive...
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Ameliorative Role of Jania Rubens Alga Against Toxicity of Heavy Metal Polluted Water in Male Rats
Soha Mohamed Hamdy,
Amany Mohamed Shaban,
Yasmeen Saeid Abdel Aziz,
Atef Mohamed Mahmoud,
Leqaa Abdel Aziz Moemen,
Wael Mohamed Ibrahim,
Nahed Shafik Gad
Issue:
Volume 2, Issue 2, December 2018
Pages:
38-46
Received:
17 November 2018
Accepted:
4 December 2018
Published:
3 January 2019
DOI:
10.11648/j.stpp.20180202.13
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Abstract: Elimination of heavy metals from contaminated water is a significant issue. Algae can be used as the detoxifying agent of these metals. This study was achieved to assess the efficacy of red marine alga (Jania Rubens) opposed to the initial modifications that may be concerning the toxicity of heavy metal-polluted water on male rats. 45 male Wistar rats were separated into 3 groups (15 rat/ group): Group I (control); Group II (Heavy metal group) and Group III (Treated group). There were significant increases in the levels of SGPT, SGOT, ALP, creatinine, urea, UA, malondialdehyde (MDA), glutathione peroxidase (GPx), protein carbonyl (PC) and significant decrease of body weights& levels of blood hemoglobin, total protein, albumin, catalase, SOD, and GSH in the heavy metal group in comparison with control. Meanwhile, the administration of treated water to rats restores all parameters to normal level in the treated group. Highly significant increase in Metallothionein (MT) levels in hepatic and renal tissue of heavy metal group compared to control, that restored to normal in the treated group. Also, Ni, Cd and Pb metals accumulated in liver, kidney and brain tissues were measured in all studied groups. Our results suggested the ameliorative effect of red marine algae treated water opposed to the toxicity of heavy metals in liver, kidney and brain tissues.
Abstract: Elimination of heavy metals from contaminated water is a significant issue. Algae can be used as the detoxifying agent of these metals. This study was achieved to assess the efficacy of red marine alga (Jania Rubens) opposed to the initial modifications that may be concerning the toxicity of heavy metal-polluted water on male rats. 45 male Wistar r...
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