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Find video protocols related to scientific articles indexed in Pubmed.
The formation potential of haloacetonitriles in the Dez River water, Iran.
Environ Technol
PUBLISHED: 08-23-2014
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The formation potential of haloacetonitriles (HANsFP) from chlorination of raw water of the Dez River in Iran was determined. Samples were collected before treatment at an intake of a water treatment plant. Tests were carried out to determine the effect of the reaction time (5-120 h), water pH (4-10), total organic carbon (TOC) content (2-8 mg L(-1)), chlorine dosage (3-25 mg L(-l)), water temperature (5-30 degrees C) and usual coagulants on HANsFP in the Dez River water. Increasing chlorine reaction time up to 80 h led to the remarkable increase in HANsFP and after that the HANsFP was gradually increased. Over 90% of the HANs was formed during 80 h reaction time. Linear relationships were found between the HANsFP and the chlorine dosage. The result showed that the HANsFP increased by increasing TOC content up to 6 mg L(-1), while further increases in the TOC level did not lead to any significant changes in the HANsFP level. The acidic water pH resulted in the highest HANsFP. An increase in water temperature enhanced the HANsFP; this factor should be considered for tropical waterworks. The ferric chloride had a high efficiency for the removal of HANsFP (72%). Overall, the Dez River water had a high potential for forming the HANs (approximately 17 microg L(-1)).
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Relativistic quantum metrology: exploiting relativity to improve quantum measurement technologies.
Sci Rep
PUBLISHED: 04-16-2014
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We present a framework for relativistic quantum metrology that is useful for both Earth-based and space-based technologies. Quantum metrology has been so far successfully applied to design precision instruments such as clocks and sensors which outperform classical devices by exploiting quantum properties. There are advanced plans to implement these and other quantum technologies in space, for instance Space-QUEST and Space Optical Clock projects intend to implement quantum communications and quantum clocks at regimes where relativity starts to kick in. However, typical setups do not take into account the effects of relativity on quantum properties. To include and exploit these effects, we introduce techniques for the application of metrology to quantum field theory. Quantum field theory properly incorporates quantum theory and relativity, in particular, at regimes where space-based experiments take place. This framework allows for high precision estimation of parameters that appear in quantum field theory including proper times and accelerations. Indeed, the techniques can be applied to develop a novel generation of relativistic quantum technologies for gravimeters, clocks and sensors. As an example, we present a high precision device which in principle improves the state-of-the-art in quantum accelerometers by exploiting relativistic effects.
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Investigation of antibacterial effect of Cadmium Oxide nanoparticles on Staphylococcus Aureus bacteria.
J Nanobiotechnology
PUBLISHED: 04-10-2014
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Inorganic antibacterial factors provide high bacterial resistance and thermal stability. Inorganic nanomaterial consists of modern formulation, biological, chemical, and physical properties produced on the basis of their function and influenced by their nano scales, the reason for which they have become very popular. The antibacterial effect of Cadmium Oxide Nanoparticles on Staphylococcus Aureus has been studied for the first time in this research because of their resistance to antibiotics.
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Dependence of the geriatric depression on nutritional status and anthropometric indices in elderly population.
Iran J Psychiatry
PUBLISHED: 10-17-2013
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Malnutrition and depression are highly prevalent in the elderly and can lead to unfavorable outcomes. The aims of the current study were to determine the association between malnutrition and depression and also to find any correlation of depression with some anthropometric indices in free living elderly.
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Measurements of Youngs and shear moduli of rail steel at elevated temperatures.
Ultrasonics
PUBLISHED: 08-10-2013
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The design and modelling of the buckling effect of Continuous Welded Rail (CWR) requires accurate material constants, especially at elevated temperatures. However, such material constants have rarely been found in literature. In this article, the Youngs moduli and shear moduli of rail steel at elevated temperatures are determined by a new sonic resonance method developed in our group. A network analyser is used to excite a sample hanged inside a furnace through a simple tweeter type speaker. The vibration signal is picked up by a Polytec OFV-5000 Laser Vibrometer and then transferred back to the network analyser. Resonance frequencies in both the flexural and torsional modes are measured, and the Youngs moduli and shear moduli are determined through the measured resonant frequencies. To validate the measured elastic constants, the measurements have been repeated by using the classic sonic resonance method. The comparisons of obtained moduli from the two methods show an excellent consistency of the results. In addition, the material elastic constants measured are validated by an ultrasound test based on a pulse-echo method and compared with previous published results at room temperature. The measured material data provides an invaluable reference for the design of CWR to avoid detrimental buckling failure.
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{4-Bromo-2-[(2-{(ethyl-sulfan-yl)[(2-oxido-benzyl-idene-?O)amino-?N]methyl-idene}hydrazinyl-idene-?N (1))meth-yl]phenolato-?O}(ethanol-?O)dioxido-uranium(VI).
Acta Crystallogr Sect E Struct Rep Online
PUBLISHED: 07-01-2013
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In the title complex, [U(C17H14BrN3O2S)O2(C2H5OH)], the U(VI) cation has a distorted penta-gonal-bipyramidal environment with the penta-gonal plane defined by two N and two O atoms of the tetra-dentate Schiff base ligand and the O atom of the ethanol mol-ecule. Two oxide O atoms occupy the axial positions. The azomethine C=N group and the Br atom are disordered over two positions in a 0.8356?(18):0.1644?(18) ratio. The ethyl-thiolyl group is disordered over three conformations in a 0.8356?(18):0.085?(6):0.079?(6) ratio, and the ethanol ligand is also disordered over three orientations in a 0.470?(16):0.277?(19):0.253?(18) ratio. In the crystal, mol-ecules form centrosymmetric dimers through hydrogen bonding between ethanol O-H donors and phenolate O-atom acceptors. Weak C-H?O inter-actions consolidate the crystal packing.
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To assess the effects of nutritional intervention based on advocacy approach on malnutrition status among school-aged children in Shiraz.
J Res Med Sci
PUBLISHED: 05-05-2013
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The present study was carried out to assess the effects of community nutrition intervention based on advocacy approach on malnutrition status among school-aged children in Shiraz, Iran.
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Analytical derivation of tortuosity and permeability of monosized spheres: a volume averaging approach.
Phys Rev E Stat Nonlin Soft Matter Phys
PUBLISHED: 02-28-2011
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Macroscopic properties of granular materials are important in modeling a variety of flow and transport phenomena in many fields of science. Determination of these parameters has always been an issue among both researchers and engineers, mainly in view of tortuosity and permeability. This paper presents analytical functions for the tortuosity and permeability of monosized sphere arrays based on a volume averaging approach and eliminates some ambiguities by modification of the original representative elementary volume model. Veracity of the proposed formulations has been illustrated through comparisons with the latest available results on the subject. Good agreement is found.
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The effect of relaxation techniques to ease the stress in infertile women.
Iran J Nurs Midwifery Res
PUBLISHED: 12-27-2010
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Infertility causes psychological and emotional tension in the couples and makes severe stress on infertile men and women. Relaxation technique is one of the methods that reduces the stress and can balance the humans emotions. This study aimed to determine the effect of relaxation on the infertile womens stress score.
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Prevalence and location of petechial spots in well infants.
Arch. Dis. Child.
PUBLISHED: 06-17-2010
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To determine the prevalence and distribution of petechiae in well infants and to evaluate their relationship with age.
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Evaluation of maximum O2 consumption: using ergo-spirometry in severe heart failure.
Acta Med Iran
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Although sport-physiologists have repeatedly analyzed respiratory gases through exercise, it is relatively new in the cardiovascular field and is obviously more acceptable than standard exercise test, which gives only information about the existence or absence of cardiovascular diseases (CVDs). Through the new method of exercise test, parameters including aerobic and anaerobic are checked and monitored. 22 severe cases of heart failure, who were candidates of heart transplantation, referring to Massih Daneshvari Hospital in Tehran from Nov. 2007 to Nov. 2008 enrolled this study. The study was designed as a cross-sectional performance and evaluated only patients with ejection fraction less than 30%. O2 mean consumption was 6.27±4.9 ml/kg/min at rest and 9.48±3.38 at anaerobic threshold (AT) exceeding 13 ml/kg/min in maximum which was significantly more than the expected levels. Respiratory exchange ratio (RER) was over 1 for all patients. This study could not find any statistical correlations between VO2 max and participants ergonomic factors such as age, height, weight, BMI, as well as EF. This study showed no significant correlation between VO2 max and maximum heart rate (HR max), although O2 maximum consumption was rationally correlated with expiratory ventilation. This means that the patients achieved maximum ventilation through exercise in this study, but failed to have their maximum heart rate being led probably by HF-induced brady-arrhythmia or deconditioning of skeletal muscles.
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Epidemiological characteristics of fatal pedestrian accidents in Fars Province of Iran: a community-based survey.
Chin. J. Traumatol.
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Objective: To determine the epidemiological characteristics of fatal pedestrian accidents in Fars Province of Iran. Methods: This cross-sectional study was conducted in Fars Province of Iran during a 29-month period from March 2009 to July 2011. The data were from the Fars Forensic Medicine Registry. In 4 923 recorded road traffic accident fatalities, 971 deaths were due to pedestrian accidents. The demographic and accident-related information were analyzed by SPSS version 11.5. P value less than 0.05 was considered significant. Results: The mean age of decedents was (47.2+/-26.2) years, ranging from 6 months to 103 years old. Males accounted for 69.8% of all deaths. Fatal accidents were most common in September; 56.1% of the fatal injuries occurred on intracity roads and 33.1% on extracity roads. Fatal head injuries were present in 60.54% of cases. Evaluation of the injury site and the cause of death found that they were significantly associated with age, interval between injury and death. Besides, the type of roads played an important role in mortality. Conclusion: Although the clinical management of trauma patients has been improved in our country in the recent decade, decreasing the burden of injuries needs coordination among trauma system organizations.
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Fatal motorcycle accidents in Fars Province, Iran: a community-based survey.
Chin. J. Traumatol.
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Objective: To identify the main characteristics of victims of motorcycle accidents in Fars Province, Iran. Methods: This cross-sectional study was conducted in Fars Province which has the fourth largest population of all 31 provinces in Iran from March 2009 to June 2010. We included data from all 542 recorded cases of fatalities due to motor vehicle accidents. Data were recorded from the forensic medicine registry consisting of demographic and accident-related information. Demographic information consisted of name, age, sex, status of fatal victim (motorcycle driver vs passenger) and educational level. Results: Of the 2 345 autopsy records from the forensic medicine archives, 542 (23.1%) gave the cause of death as motor vehicle accidents. Mean age of these victims was (31.4+/-6.5) years, and the male to female ratio was 28. Head injury was the most common cause of death in these victims, and overall they tended to have a low level of education. Motorcycle accidents frequently involved younger age groups (15-35 years), and head trauma related with non-use of a helmet was the most common cause of death. Conclusions: Head injury is frequent among victims in the province we studied. This situation may be related to the victims low socioeconomic status and little education regarding traffic laws leading to speeding and disregard of these laws along with their weak enforcement.
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How particle shape affects the flow through granular materials.
Phys Rev E Stat Nonlin Soft Matter Phys
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Flow through the pores of granular materials has many instances in practice. Therefore, it is interesting to realize how some parameters, such as the shape of the particles affect the passing flow. Following the recent mathematical theory proposed by the authors, this paper deals with the issue of how tortuosity and permeability are influenced by the particle shape. Comparison of the results with the experimental data reveals the competency of the theory in predicting the impact of particle geometry.
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Factorial experimental design application in modification of volcanic ash as a natural adsorbent with Fenton process for arsenic removal.
Environ Technol
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This paper describes an experimental design technique for the modification of volcanic ash with Fenton reagent (FMVA) to be used as a natural adsorbent in the removal of As(III) and As(V) from aqueous solution. The influence of pH, contact time and Fe(2+)/H2O2 on arsenic removal by the modified volcanic ash was investigated. It was observed that the arsenic removal efficiency was influenced by two of these parameters. The Fe(2+)/H2O2 ratio is an important factor that affects both As(III) and As(V) adsorption (P = 0.000). The pH affects As(V) adsorption (P = 0.003) more significantly than As (III) adsorption (P = 0.02). It was observed that the maximum As(III) adsorption by the FMVA was obtained at pH 2, Fe(+2)/H2O2 = 0.06 and 30 min of contact time (39 microg As(III) per mg FMVA), whereas the maximum As(V) adsorption was obtained under the conditions of pH 5, Fe(+2)/H2O2 = 0.06 and 30 min of contact time (41 microg As(V) per mg FMVA).
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{4-Bromo-2-[(2-{(ethyl-sulfan-yl)[(2-oxidobenzyl-idene-?O)amino-?N]methylidene}hydrazinyl-idene-?N)meth-yl]phenolato-?O}(butan-2-ol-?O)dioxidouranium(VI).
Acta Crystallogr Sect E Struct Rep Online
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The U(VI) cation in the title complex, [U(C(17)H(14)BrN(3)O(2)S)O(2)(C(4)H(10)O)], exists within a distorted penta-gonal-bipyramidal geometry, where the oxide atoms occupy the axial positions [O-U-O = 179.8?(3)°] and the penta-gonal plane is defined by the N(2)O(2) atoms of the tetra-dentate Schiff base ligand and the O atom of the 2-butanol mol-ecule. In the crystal, centrosymmetric aggregates are formed via pairs of hy-droxy-phenolate O-H?O hydrogen bonds. The azomethine C=N atoms, the ethyl-thiolyl group, the 2-butanol mol-ecule and Br atom are disordered over two positions in a 0.627?(3):0.373?(3) ratio.
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Bis[?-4-(2-oxidobenzyl-idene)thio-semi-carbazidato-?S,N,O:O]bis-[(pyridine-?N)zinc].
Acta Crystallogr Sect E Struct Rep Online
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In the title compound, [Zn(2)(C(8)H(7)N(3)OS)(2)(C(5)H(5)N)(2)], the Zn(2)O(2) ring has a flattened roof shape, with the roof angle equal to 10.10?(6)°. The thio-semicarbazones act as tridentate ligands to one Zn(II) atom, with the O atoms additionally in bridging positions to the second Zn(II) atom. Both Zn(II) atoms are five-coordinated; the coordination polyhedra are close to square pyramids, with the pyridine N atoms at apical positions. Two inter-molecular N-H?N and one relatively weak N-H?S hydrogen bond, together with C-H?S weak inter-actions, connect the mol-ecules into a three-dimensional network.
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C-reactive protein of serum and peritoneal fluid in endometriosis.
Iran J Nurs Midwifery Res
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Endometriosis is defined as the existence of endometrial-like tissue outside the uterus. Diagnosis of endometriosis is a challenging theme. Despite the broad search for innovative laboratory tests and advances in imaging technologies, there are still no easy, non-invasive diagnostic tests available. Due to inflammatory process of endometriosis, still C-reactive protein (CRP) level may be the target of initial screening. The aim of this study was to investigate CRP levels as a marker of inflammatory process in serum and peritoneal fluid of patients with endometriosis.
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What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

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We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

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In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.