scholarly journals An environmentally friendly soil improvement technology for sand and dust storms control

2019 ◽  
Vol 6 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Sareh Rajabi Agereh ◽  
Farshad Kiani ◽  
Kazem Khavazi ◽  
Hassan Rouhipour ◽  
Farhad Khormali
Keyword(s):  
Wind Velocity ◽  
Soil Loss ◽  
High Efficiency ◽  
Soil Stabilization ◽  
Soil Surface ◽  
Soil Samples ◽  
Dust Storms ◽  
Control Group ◽  
Soil Particles ◽  
And Control

Background: Dust storms occur when unchecked, strong, or turbulent winds combine with exposed loose and dried soil surfaces. Sand and dust storms have a significant impact on society, economy, and environment at local, regional, and global levels. The environmental and health hazards of such storms cannot be permanently reduced, however, by taking appropriate measures, its impact can be reduced. The present study aimed to investigate the effects of microbial precipitation of calcium carbonate (CaCO3) as a biocompatible agent on soil stabilization and control of dust storms using ureaseproducing bacteria (UPB) as a biological improvement technique, which were isolated, identified, sprayed on the soil surface. Methods: For this purpose, the erosion of bio-cemented soil samples was investigated experimentally in a wind tunnel under the condition of wind velocity of 0 to 98 km.h-1 in two soil types with sandy and silty texture in a completely randomized design with three replicates. Results: The investigation of the threshold wind velocity of soil particles showed that soil particles began to move at velocity of 8 and 10 km.h-1 in silty and sandy soils, respectively, but in all biological samples (MICP), particles did not move until the wind speed reached 97 km.h-1. It was also revealed that the weight loss of all MICP-treated samples at different wind velocities was significantly reduced compared to the control group. Differences in the amount of soil loss among bio-cemented samples and control treatments were even superior at higher velocities, so that at velocities more than 57 km.h-1, soil losses increased significantly in the control group, while in soils treated with bacteria, soil loss was very low (about 2.5 kg.m-2.h-1). Comparison of the bacteria used in this study also showed that Bacillus infantis and Paenibacillus sp3 had high efficiency in controlling dust storms. Conclusion: The formation of abrasion-resistant surface layers on soil samples treated by biocementation showed that cementation by biological methods could be an effective way to stabilize surface particles and control sand and dust storms.

MOVEMENT OF SOIL PARTICLES IN SALTATION

1962 ◽  
Vol 42 (1) ◽  
pp. 81-86 ◽  
Author(s):  
F. Bisal ◽  
K. F. Nielsen
Keyword(s):  
Wind Velocity ◽  
Constant Velocity ◽  
Soil Surface ◽  
Angle Of Incidence ◽  
Constant Ratio ◽  
Soil Particles ◽  
Impulsive Forces ◽  
Straight Lines

A study was made of the manner in which the movement of particles involved in saltation was initiated. The paths of flight of these particles while air borne were also studied.Evidence is presented to show initiation of movement can be caused by impulsive forces generated by differences in wind velocity, and by the distribution of particles, at the soil surface. Photographs of particles in saltation show that the paths of descent are nearly straight lines with an angle of incidence of about 6 ± 4 degrees. The data suggest that constant velocity in both the forward and downward directions is attained very quickly and that these velocities remain in essentially a constant ratio for most of the downward path.

scholarly journals Raindrop Influence on the Soil Surface

Proceedings ◽  
2020 ◽  
Vol 30 (1) ◽  
pp. 61
Author(s):  
Martin Neumann ◽  
David Zumr ◽  
Petr Kavka ◽  
Tomáš Dostál ◽  
Tomáš Laburda ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Soil Loss ◽  
Soil Surface ◽  
Soil Mass ◽  
Soil Samples ◽  
Rain Gauges ◽  
Disturbed Soil ◽  
Initial Stage ◽  
Soil Surface Roughness ◽  
Surface Consolidation

Soil erosion through various water processes is a worldwide problem. This research is focused on raindrops’ impact on soil surfaces, which is generally considered the initial stage of the erosion process. Splash erosion monitoring was conducted across three experimental sites: Petzenkirchen, Mistelbach (Austria) and Prague (Czech Republic). At each site, the rainfall characteristics (intensity and kinetic energy) were measured by rain gauges and disdrometers, and the impacts on soils (soil loss, soil surface consolidation, changes in soil surface roughness) were evaluated. Several disturbed soil samples with an area of 78.5 cm2 were placed into splash cups prior to each event. The splash cup collects the soil particles that are splashed out of the sample area when a raindrop hits the soil surface. The collected sediment suspension is processed in the laboratory after each event to determine the lost soil mass. Ground photogrammetry was utilized to determine the surface consolidation of a sample caused by a given rainfall event. Results for more than 500 soil samples were included in this study. Relationships between kinetic energy, rainfall intensity and soil loss and consolidation were evaluated.

Conjugated Linoleic Acid Causes a Marked Increase in Liver α-Tocopherol and Liver α-Tocopherol Transfer Protein in C57BL/6 J Mice

2010 ◽  
Vol 80 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Pei-Min Chao ◽  
Wan-Hsuan Chen ◽  
Chun-Huei Liao ◽  
Huey-Mei Shaw
Keyword(s):  
Antioxidant Enzymes ◽  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Thiobarbituric Acid ◽  
Control Group ◽  
Thiobarbituric Acid Reactive Substances ◽  
Control Groups ◽  
Protein Levels ◽  
Transfer Protein ◽  
And Control

Conjugated linoleic acid (CLA) is a collective term for the positional and geometric isomers of a conjugated diene of linoleic acid (C18:2, n-6). The aims of the present study were to evaluate whether levels of hepatic α-tocopherol, α-tocopherol transfer protein (α-TTP), and antioxidant enzymes in mice were affected by a CLA-supplemented diet. C57BL/6 J mice were divided into the CLA and control groups, which were fed, respectively, a 5 % fat diet with or without 1 g/100 g of CLA (1:1 mixture of cis-9, trans-11 and trans-10, cis-12) for four weeks. α-Tocopherol levels in plasma and liver were significantly higher in the CLA group than in the control group. Liver α-TTP levels were also significantly increased in the CLA group, the α-TTP/β-actin ratio being 2.5-fold higher than that in control mice (p<0.01). Thiobarbituric acid-reactive substances were significantly decreased in the CLA group (p<0.01). There were no significant differences between the two groups in levels of three antioxidant enzymes (superoxide dismutase, glutathione peroxidase, and catalase). The accumulation of liver α-tocopherol seen with the CLA diet can be attributed to the antioxidant potential of CLA and the ability of α-TTP induction. The lack of changes in antioxidant enzyme protein levels and the reduced lipid peroxidation in the liver of CLA mice are due to α-tocopherol accumulation.

TEACHING READING BY UTILIZING HOT POTATOES SOFTWARE TOWARD STUDENTS’ READING COMPREHENSION OF DESCRIPTIVE TEXT

2018 ◽  
Vol 5 (1) ◽  
pp. 26
Author(s):  
Abdullah Farih
Keyword(s):  
Reading Comprehension ◽  
Alternative Hypothesis ◽  
T Test ◽  
Control Group ◽  
Teaching Reading ◽  
Post Test ◽  
Quasi Experimental ◽  
Independent Variable ◽  
Level Of Significance ◽  
And Control

The objective of this study is to measure whether there is or not significant effect of teaching reading by utilizing Hot Potatoes software toward students’ reading comprehension of descriptive text. The variables used were the teaching treatment of Hot Potatoes Software as the independent variable and the students’ reading comprehension of Descriptive Text as dependent variable. Then, the research designed was Quasi-experimental design and the presentation of data used was quantitative. The data were obtained from the eleventh grade, of which 28 students were taken as sample. The students are divided into two groups; experiment group consisted of 12 students and control group consists of 16 students. To get the data, the pre-test and post-test were applied and then analyzed using t-test formula. The researcher had concluded that there is Significant effect of Hot Potatoes Software toward the students’ reading comprehension achievement. The result showed that mean of students’ post-test was increased. It is proved by the t-test (8.54) which is higher than t-table (2.05) at level of significance 5%. It means that the alternative hypothesis was accepted and it proved that Hot Potatoes Software had significant effect toward students’ reading comprehension of Descriptive Text

Perbandingan Efek Suplementasi Tablet Tambah Darah Dengan Dan Tanpa Vitamin C Terhadap Kadar Hemoglobin Pada Ibu Hamil Dengan Usiakehamilan 16-32 Minggu Di Desa Keniten Kecamatan Mojo Kabupaten Kediri

2017 ◽  
Vol 3 (1) ◽  
pp. 76
Author(s):  
Siti Asiyah ◽  
Dwi Estuning Rahayu ◽  
Wiranti Dwi Novita Isnaeni
Keyword(s):  
Treatment Group ◽  
Vitamin C ◽  
Gestational Age ◽  
Group Treatment ◽  
Sampling Technique ◽  
Hemoglobin Level ◽  
The Body ◽  
Control Group ◽  
Fetal Organ ◽  
And Control

The needed of Iron Tablet in pregnancy was increase than mother who not pregnant.  That  cause of  high metabolism at the pregnancy for formed of  fetal organ and energy. One of effort for prevent anemia in mother pregnant with giving the Iron tablet and vitamin c. The reason of  this research in 4 June – 11 July 2014 is for compare the effect of  iron tablet suplementation with and without vitamin C toward Hemoglobin level in mother pregnant With Gestational Age Of 16-32 Weeks In Desa Keniten Kecamatan Mojo Kabupaten Kediri. This research method using comparative analytical.  Research design type of Quasy Eksperiment that have treatment group and control group. Treatment group will giving by Iron tablet and 100 mg vitamin C, and control group just giving by iron tablet during 21 days. Population in this research are all of mother pregnant with Gestational Age Of 16-32 Weeks with Sampling technique is  cluster random sampling is 29 mother pregnant. Comparison analysis of  iron tablet suplementation effect with and without vitamin C toward Hemoglobin level in mother pregnant With Gestational Age Of 16-32 Weeks, data analysis using Mann Whitney U-test and the calculated U value (44,5) less than U-table (51). So there was difference of iron tablet suplementation effect with and without vitamin C toward Hemoglobin level in mother pregnant With Gestational Age Of 16-32 Weeks Therefore, the addition of vitamin C on iron intake is needed to increase the uptake of iron tablets. When the amount of iron uptake increases, the reserves of iron in the body will also increase, so as to prevent anemia in pregnant women; Keywords : Iron Tablet (Fe), Vitamin C, Hemoglobin level, Mother Pregnant

PENGARUH PENDEKATAN APTITUDE TREATMENT INTERACTION (ATI) TERHADAP PEMAHAMAN KONSEP MATEMATIKA SISWA KELAS VIII SMP NEGERI 25 PEKANBARU

2015 ◽  
Vol 4 (1) ◽  
pp. 79
Author(s):  
Herlina '
Keyword(s):  
Control Group ◽  
Treatment Interaction ◽  
Aptitude Treatment Interaction ◽  
Research Experiment ◽  
And Control

This research intent to see how big influence of approaching aptitude treatment interaction (ATI) to mathematics concept grasp student brazes VIII SMP Country 25 Pekanbaru. This research constitute my research experiment attention. Subjec in observational it is student braze VIII4 as agglomerate as experiment by totals student 40 person and VIII3'S classes as agglomerate as controls by totals students 40. Base analisis data to pretes's score to know student startup ability on agglomerate experiment and control group. On student experiment group that will study by ATI'S approaching has average early learned result mathematics (pretes) as big as 17,15. Meanwhile on group controls student who will study by ordinary learning (conventional) have average early learned result mathematics (pretes) as big as 13,85. Analisis is data to postes's score on agglomerate learned student experiment with ATI'S approaching has average final learned result mathematics (postes) as big as 74,63. Meanwhile on group controls learned student with ordinary learning (conventional) have average final learned result mathematics (postes) as big as 62,93. Of quiz result distinctive both of average usufruct to study mathematics finals (postes) that points out that there is difference which signifikan among both of experiment class with control class.Keywords: aptitude treatment interaction (ATI), mathematics concept

Non Emergency Calls-Depression Coupling in Call Handlers of Rescue 1122 Punjab, Pakistan

2019 ◽  
Vol 34 (Spring 2019) ◽  
pp. 43-55
Author(s):  
Syed Kamal Abid ◽  
Mujahid Hussain ◽  
Muhammad Raza ◽  
Rizwan-ul Haq ◽  
Rizwan Naseer ◽  
...  
Keyword(s):  
Occupational Stress ◽  
Independent Predictor ◽  
Depression Score ◽  
Demographic Variables ◽  
Workplace Stress ◽  
Control Group ◽  
Control Room ◽  
Emergency Calls ◽  
And Control ◽  
Evening Shift

The study was conducted to know whether bulk inflow of Non Emergency Calls (NECs) acts as an independent predictor for depression in call handlers of Rescue 1122, Punjab, Pakistan. Forty five (45) call handlers were recruited from evening shift of 9 districts. Similarly, same-sized control group was made out of field rescuers. The groups were compared for rate and severity level of depression using Beck’s Depression Inventory-II (BDI-II; Beck, Steer, & Brown, 1996). Probable predictors (except workplace stress) for depression in call handlers were evaluated through risk estimates. For workplace stress, a purposefully developed close- ended Workplace Stress Questionnaire including two subscales i.e. Non Emergency call and Control Room Environment of 30 items each was administrated. Twenty nine (64.4%) subjects of study group reported depression on BDI. Consequently, the same group had significantly higher mean depression score than control (18.2 vs. 12.6; p = .00). The scores also showed insignificant association with any of the probable predictors (demographic variables) of the call attendees. The respondents perceived more occupational stress against NECs. The findings attract the attention of authorities towards the severity of the concern.

The Estimation of prostate specific antigen (PSA) concentrations in patients with prostatitis by fully automated ELISA technique.

2020 ◽  
Vol 3 (11) ◽  
pp. 1100-1104
Author(s):  
Hussein Naeem Aldhaheri ◽  
Ihsan Edan AlSaimary ◽  
Murtadha Mohammed ALMusafer
Keyword(s):  
Personal Information ◽  
Receptor Gene ◽  
Specific Antigen ◽  
Gene Clusters ◽  
Control Group ◽  
P Value ◽  
Group Data ◽  
Elisa Technique ◽  
And Control

      The Aim of this study was to determine Immunogenetic expression of  Toll-like receptor gene clusters related to prostatitis, to give acknowledge about Role of TLR in prostatitis immunity in men from Basrah and Maysan provinces. A case–control study included 135 confirmed prostatitis patients And 50 persons as a control group. Data about age, marital status, working, infertility, family history and personal information like (Infection, Allergy, Steroid therapy, Residency, Smoking, Alcohol Drinking, Blood group, Body max index (BMI) and the clinical finding for all patients of Prostatitis were collected. This study shows the effect of PSA level in patients with prostatitis and control group, with P-value <0.0001 therefore the study shows a positive significant between elevated PSA levels and Prostatitis.

Thromboembolic complications prevention in the obstetric practice

2017 ◽  
pp. 19-24
Author(s):  
O.V. Grishchenko ◽  
◽  
V.V. Bobrytska ◽  
Keyword(s):  
Pulmonary Embolism ◽  
Comparison Group ◽  
Main Group ◽  
Control Group ◽  
Efficacy And Safety ◽  
Thromboembolic Complications ◽  
Moderate Risk ◽  
Obstetric Practice ◽  
Thrombotic Complications ◽  
And Control

The objective: To evaluate the clinical efficacy and safety of Enoxaparin-Pharmex for the prevention of thrombotic complications (pulmonary embolism) in the postoperative period in patients with moderate risk of these complications. Patients and methods. The study included 50 women after a caesarean section had an average degree of risk of pulmonary embolism. Patients were divided into the main group (n=25) and control group (n=25) in accordance with the treatment: patients of the main group received postoperative Еnoxaparin- Pharmex, group comparisons enoxaparin sodium (brand foreign manufacturer’s). Patients in both groups received the drug at a dose of 20 mg for 5 days, 1 time per day subcutaneously. Results. The research data analysis showed identity results of hemostasiogram of patients in the main group and the comparison group, no side effects after treatment in both groups. Conclusion. The clinical studies suggest the drug Enoxaparin-Pharmex is effective, safe LMWH, which can be used to prevent troboembolic complications, including post-operative treatment in obstetric practice. Spectrum of Enoxaparin-Pharmex can be extended to the prevention and treatment of thromboembolic conditions of varying severity with appropriate doses of the drug. Key words: Enoxaparin-Pharmex, prevention of pulmonary embolism.

Sign in / Sign up

Export Citation Format

Share Document