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Institution

Jordan University of Science and Technology

EducationIrbid, Irbid, Jordan
About: Jordan University of Science and Technology is a education organization based out in Irbid, Irbid, Jordan. It is known for research contribution in the topics: Population & Health care. The organization has 7582 authors who have published 13166 publications receiving 298158 citations. The organization is also known as: JUST.


Papers
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Journal ArticleDOI
TL;DR: An electrostatic model is proposed based on two assumptions: 1) the presence of a positive electrostatic end cap on the halogen atom (except for fluorine) and 2) the electronic charge is anisotropically distributed around the Halogen atom.
Abstract: A study of the halogen···hal- ogen contacts in organic compounds using ab initio calculations and the re- sults of previously reported crystallo- graphic studies show that these interac- tions are controlled by electrostatics. These contacts can be represented by the geometric parameters of the C� X1···X2� C moieties (where q1 = C� X1···X2 and q2 = X1···X2 � C; ri = X1···X2 distance). The distributions of the con- tacts within the sum of van der Waals radii (rvdW) versus qi (q1 = q2) show a maximum at q � 1508 for X = Cl, Br, and I. This maximum is not seen in the distribution of F···F contacts. These re- sults are in good agreement with our ab initio calculations. The theoretical results show that the position of the maximum depends on three factors: 1) The type of halogen atom, 2) the hy- bridization of the ipso carbon atom, and 3) the nature of the other atoms that are bonded to the ipso carbon atom apart from the halogen atom. Calculations show that the strength of these contacts decreases in the follow- ing order: I···I > Br···Br > Cl···Cl. Their relative strengths decrease as a func- tion of the hybridization of the ipso carbon atom in the following order: sp 2 > sp > sp 3 . Attaching an electroneg- ative atom to the carbon atom strengthens the halogen···halogen con- tacts. An electrostatic model is pro- posed based on two assumptions: 1) The presence of a positive electrostatic end cap on the halogen atom (except for fluorine) and 2) the electronic charge is anisotropically distributed around the halogen atom.

389 citations

Journal ArticleDOI
TL;DR: The improved growth, yield and nutrient uptake in wheat plants reported here demonstrate the potential of mycorrhizal inoculation to reduce the effects of drought stress on wheat grown under field conditions in semiarid areas of the world.
Abstract: Mycorrhizal plants often have greater tolerance to drought than nonmycorrhizal plants. This study was conducted to determine the effects of arbuscular mycorrhizal (AM) fungi inoculation on growth, grain yield and mineral acquisition of two winter wheat (Triticum aestivum L.) cultivars grown in the field under well-watered and water-stressed conditions. Wheat seeds were planted in furrows after treatment with or without the AM fungi Glomus mosseae or G. etunicatum. Roots were sampled at four growth stages (leaf, tillering, heading and grain-filling) to quantify AM fungi. There was negligible AM fungi colonization during winter months following seeding (leaf sampling in February), when soil temperature was low. During the spring, AM fungi colonization increased gradually. Mycorrhizal colonization was higher in well-watered plants colonized with AM fungi isolates than water-stressed plants. Plants inoculated with G. etunicatum generally had higher colonization than plants colonized with G. mosseae under both soil moisture conditions. Biomass and grain yields were higher in mycorrhizal than nonmycorrhizal plots irrespective of soil moisture, and G. etunicatum inoculated plants generally had higher biomass and grain yields than those colonized by G. mosseae under either soil moisture condition. The mycorrhizal plants had higher shoot P and Fe concentrations than nonmycorrhizal plants at all samplings regardless of soil moisture conditions. The improved growth, yield and nutrient uptake in wheat plants reported here demonstrate the potential of mycorrhizal inoculation to reduce the effects of drought stress on wheat grown under field conditions in semiarid areas of the world.

387 citations

Journal ArticleDOI
TL;DR: A new sprayable, elastic, and biocompatible composite hydrogel, with broad-spectrum antimicrobial activity, for the treatment of chronic wounds is reported, engineered using two ECM-derived biopolymers and the antimicrobial peptide Tet213.

385 citations

Journal ArticleDOI
TL;DR: It is demonstrated that diabetics had significantly worse oral hygiene, higher severity of gingival disease as measured by the average ofGingival index (GI) and higher severityof periodontal disease as measures by theaverage of probing pocket depth (PPD) and clinical attachment loss (CAL).
Abstract: Background This meta-analysis was conducted to assess the association between diabetes mellitus and periodontal diseases by comparing the extent and severity of periodontal diseases between diabetics and nondiabetics. Methods A literature search was performed using MEDLINE database for published studies from January 1970 through October 2003 with manual search for references in relevant studies. This meta-analysis was based on 18 comparative cross-sectional studies, three prospective cohort studies and baseline data of two clinical trials that compared oral hygiene, gingival and periodontal status between diabetics and nondiabetics. Heterogeneity was obvious among included studies; therefore, the analysis using random-effects model was conducted. Results This study demonstrated that diabetics had significantly worse oral hygiene as measured by the average of plaque index (P1I), higher severity of gingival disease as measured by the average of gingival index (GI) and higher severity of periodontal disease as measured by the average of probing pocket depth (PPD) and clinical attachment loss (CAL). However, diabetics had similar extent of oral hygiene, gingival and periodontal disease as measured by percentages of surfaces or sites with specific scores of P1I, GI, bleeding on probing (BOP), PPD and CAL. Conclusions Diabetics had a significantly higher severity but the same extent of periodontal disease than nondiabetics.

383 citations

Journal ArticleDOI
TL;DR: In this article, the adsorption kinetics and isotherms of methylene blue (MB) on raw and thermally activated date pits, an agricultural solid waste, were investigated.

370 citations


Authors

Showing all 7666 results

NameH-indexPapersCitations
Andrew McCallum11347278240
Yousef Khader94586111094
Michael P. Jones9070729327
David S Sanders7563923712
Nidal Hilal7239521524
Nagendra P. Shah7133419939
Jeffrey R. Idle7026116237
Rahul Sukthankar7024028630
Matthias Kern6633214871
David De Cremer6529713788
Moustafa Youssef6129915541
Mohammed Farid6129915820
Rudolf Holze5838813761
Rich Caruana5714526451
Eberhardt Herdtweck5633210785
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202331
2022104
20211,371
20201,304
2019994
2018862