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Carcasses M.,LMDC | Linger L.,VCNCI Construction Grands Projets | Cussigh F.,VCNCI Construction France | Rougeau P.,CERIB | And 6 more authors.
Concrete - Innovation and Design: fib Symposium Proceedings | Year: 2015

To define a durable concrete in a given environment, three approaches are mentioned in the EN 206 standard: - the prescriptive approach based on limiting values for the concrete composition; - the use of equivalent performance concept mentioned in chapter; - the use of the performance-related design method mentioned in chapter 5.3.3. The performance-based approach to concrete durability appears to be more and more popular in the construction sector. During the past last years, numerous studies have been carried out worldwide in order to better assess the concrete durability expected properties, leading to the standardization of testing protocols but also to a better understanding of main influencing parameters as far as concrete overall durabiliry is concerned. In this context, the French Association for Civil Works (acronym AFGC) has set up a working group for the constitution of a database dedicated to durability indicators shared by the owners, engineering companies, contractors, state owned and public laboratories, universities, concrete constituents suppliers, concrete ready-mix suppliers. The goals are to establish relevant links between concrete mix design inputs and achieved durability indicators values, to help for the detennination of statistical distribution laws of several durability indicators and to define durability indicators threshold values corresponding to the different EN 206 exposure classes. This article is detailing the first major task of the working group which was to define the proper matrix and organization of this database by defining the relevant inputs (compulsory. optional) and also to select a convenient tool to be easily used and shared in the future.

Shahbaz T.,Lahore Medical and Dental College | Raza S.M.,LMDC | Manzoor Z.,LMDC | Jamshid A.,LMDC
Pakistan Journal of Medical and Health Sciences | Year: 2014

Results: Total 280 medical students were interviewed. Among them 25.7% (60) were from first year, 21.4 %(60) from second year, 24.3% (68) from third year and 28.6%(80) were fourth year medical students. The age ranged from 18-25 years with 41.4% (116) of male students and 58.6%(164) were females. About 80-90% (224-250) showed a good knowledge about transmission and prevention of these infections. 63.6% (178) believe that hepatitis B and C can be transmitted as nosocomial infections and 72.5(203) know that these infections are widely transmitted like HIV/AIDS. 85% (238) were of the opinion that they are at greater risk of having them due to their profession. Among 270 students, 200(71.4%) were fully vaccinated against hepatitis B and 32(11.9%) were partially vaccinated.48 (17.1%) were the students who were not vaccinated at all.Background and Aims: Medical students like other health workers are being part of the health care delivery system are exposed to the same size of risk as other health care workers when they come in contact with patients and contaminated instruments. They are the first level of contact between patients and medical care. They are expected to undertake activities related to patient care with the beginning of their clinical years. They are involved in blood transfusion, injections and surgical operations in their practices. They should have awareness about the risk factors and appropriate precautionary measures to avoid these infections in handling these patients.Study Settings: Descriptive cross sectional study.Methods: A closed ended questionnaire consisting of questions to evaluate the knowledge regarding hepatitis B and C infection, attitude and perception of the medical students was duly filled by 280 students including First, Second, third and Fourth year. The data were entered and analyzed using Statistical Package for Social Sciences (SPSS) software version 20.Conclusion: Level of knowledge was associated with academic grade of the students. Overall knowledge was found to be high but vaccination status was low for this particular group. © 2014 Pakistan Journal of Medical and Health Sciences. All Rights Reserved.

Fatima A.,Lahore Medical and Dental College | Shad M.N.,Islam Medical and Dental College | Asrar A.,LMDC | Murad S.,IMandDC
Pakistan Journal of Medical and Health Sciences | Year: 2014

Hyperlipidemia with increased body weight are main cause of consideration on CAD. These pathological states eventually leading to development of metabolic syndrome are leading cause of morbidity and mortality throughout the world. Various drug groups and regimen are being used to handle these problems but none is absolute satisfactory due to their widespread side effects and low compliance. Conventional use of nigella sativa for many diseases are now emerging in allopathic discipline of healthcare to cure various diseases with good compliance with least side effects. This study was conducted in Lipid Research Centre, Pakistan Institute of Cardiology, Lahore, Pakistan, from October to December 2013. Study period was one month. Sixty male and female hyperlipidemic patients age range from 20 to 70 years were included in the research with written explained and approved consent. All patients were divided in two equal groups. In Group-A, 30 patients were advised to take two spoons of kalonji after breakfast for the period of four weeks. In group-II, 30 hyperlipidemic patients were advised to take placebo capsules after breakfast everyday for the period of four weeks. At the end of research work, mean values of all parameters with ±SD were analyzed statistically using paired 't' test. These results were compared with placebo therapy and observed that both parameters showed highly significant change, with p-value <0.001. We concluded from these results that kalonji is very effective herbal drug to increase HDL-c and decrease body weight.

Tufail S.,S Z Medical College | Fatima A.,LMDC | Niaz K.,IM and DC | Qusoos A.,FM and DC | Murad S.,IMDC
Pakistan Journal of Medical and Health Sciences | Year: 2015

Back ground: Hyperlipidemia is one of the important risk factor to develop coronary artery disease (CAD) leading to main cause of morbidity and mortality due to heart attack and cardiac arrhythmias. Decreased level of plasma HDL-cholesterol independently can cause CAD. Recent studies have proved that walnuts can increase plasma HDL-cholesterol if taken in specific amount per day regularly Place and duration of study: Lahore General Hospital, Lahore from January 2014 to April 2014. Methodology: The baseline values of HDL-cholesterol were measured at day-0 and day-60 by separating other lipoprotein fractions using chemical precipitation with Mg2+, then coupling the products of a cholesterol oxidase reaction. Forty hyperlipidemic patients were selected from Lahore General Hospital for the study. Age of patients ranged from 20 to 65 years. Both gender male and female patients were enrolled. They were advised to discontinue any hypolipidemic medications and foods. Patients suffering from any metabolic disease, renal impairment, liver disease, and already having any cardiac problems were excluded from the research study. Forty patients were divided in two groups, twenty individuals in each group. Group-1 was advised to take 30 grams of walnuts (without shell) per day for the period of eight weeks. Group-II was considered as control group and was advised not to take any dry fruit including walnuts. Results: In twenty hyperlipidemic patients, two months therapy with 30 grams of walnuts per day increase in HDL-cholesterol was 6.3 mg/dl which was significant change when analyzed biostatistically, showing p-value <0.01. Statistical analysis: Mean values with SD and SEM were analysed statistically by using SPSS version 16.1. P-value of <0.001 was considered as significant and p-value of >0.05 was considered as non-significant change. Conclusion: It was concluded that regular intake of specific amount of walnuts without shell can increase good cholesterol (HDL-cholesterol) in male and female patients of age range from 18-65 yrs.

News Article | November 6, 2016
Site: www.theguardian.com

As the world gathers in Morocco for the historic first meeting under the Paris agreement – called “COP22” but now also “CMA1” – it does so with the unprecedented involvement of corporate interests who have fought climate action around the world, funded climate change denial and whose fundamental interest is in extracting and burning as much fossil fuel as possible. Earlier this year, desperate moves from countries representing the majority of the world’s population to examine how the UN might identify and minimise conflicts of interest were swept under the carpet by rich countries – especially the US, EU and Australia – who argued they wanted to be as “inclusive” as possible and that the concept of “conflict of interest” was too hard to define. As a result, representatives of companies such as ExxonMobil, Chevron, Peabody, BP, Shell and RioTinto will have unquestioned access to most discussions in Marrakech, will be called upon for advice and will be walking the corridors and holding private discussions with countries that are trying to move the world to stop consuming the products those companies have based their businesses on. The bodies through which those companies access the COP22 meetings have been detailed in a chart created by Corporate Accountability International. Groups such as the World Coal Association, the Business Council of Australia, Business Europe and Business Roundtable will represent the world’s biggest fossil fuel companies in the meetings through their “observer status”. Jesse Bragg from Corporate Accountability International says it is clear those groups are driven by a profit motive and not by the desire to curb carbon emissions, and so have a conflict of interest. “It’s hard to believe the World Coal Association is having conversations with delegates, encouraging them to more strictly regulate the coal industry,” Bragg says. “That’s completely against their interests. So what is their purpose in that space other than to continue to extract and burn coal?” Bragg says those groups have a role to play in the implementation of the rules set by nations but no legitimate role to play in the setting of the rules themselves. The role many fossil fuel companies play in policy debates as the world attempts to curb carbon emissions has been clear: In a striking irony, the climate change COP at which these corporate interests will be welcome will happen at exactly the same time as another UN COP, where the exclusion of corporate interests has been hailed as a fundamental ingredient to its success: COP7 of the Framework Convention on Tobacco Control, starting today in Delhi, India. At that meeting, a report will be presented analysing the impact of the tobacco control treaty. It concludes the FCTC “has contributed to significant and rapid progress” in tobacco control action. Part of the FCTC – article 5.3 – says that “parties shall act to protect these policies from commercial and other vested interests of the tobacco industry in accordance with national law”. The treaty recognises that “there is a fundamental and irreconcilable conflict between the tobacco industry’s interests and public health policy interests.” It then goes on to recommend almost no contact with the tobacco industry, except when necessary to implement regulation of their products. “It’s pretty much the most important aspect of implementation,” says Mike Daube from Curtin University in Australia, of article 5.3. Daube was the deputy chairman of the committee that wrote the report on the impact of the tobacco control treaty. “It essentially says that governments should only speak with the tobacco industry when they absolutely have to and do so holding their nose and washing their hands afterwards,” Daube says. Despite the strong acknowledgement of corporate conflicts of interest in that UN treaty, rich countries have argued strongly against any measure to limit corporate involvement in the implementation of the Paris agreement. In May, the Like Minded Group of Developing Countries (LMDC) – a collection of more than 20 countries representing most of the world’s population – pushed for an report to be prepared examining how “the United Nations system and other intergovernmental forums … identify and minimise the risk of conflicts of interest”. Far from a radical call for governments to distance themselves from the fossil fuel lobby, it merely asked for a report on how conflicts of interest have been dealt with in other forums. But that request was deleted from the final report from the meeting and a “technical glitch” meant an objection raised by Ecuador on behalf of the majority of the world’s population was ignored. The Venezuelan delegation spoke strongly about the issue: But the EU, Australia and the US rose to speak against any exclusion of fossil fuel lobbyists. The Australian delegation framed the issue as one where developing countries were trying to make the process less “open”, despite supporting measures in the tobacco control treaty to lock out the tobacco industry: Australia also argued the concept of “conflict of interest” itself was too hard to define, despite the issue being grappled with in many other forums: The US delegation also framed the issue as one where they were trying to be as inclusive as possible. “We oppose constraining NGO participation in the UNFCCC process,” the US delegation said. Besides having access to meetings as observers, with no conflict of interest screening, the unprecedented level of corporate influence on the implementation of the Paris agreement was formalised in the global climate action agenda, through which corporations who make carbon-cutting pledges get high-level access to the meetings, can organise side events in the “civil society village”, promote their products in a “gallery” and sponsor the conference. Kingsley Faulkner is the deputy president of the Australian Council of Smoking and Health as well as the national chair of Doctors for the Environment Australia. Faulkner says the exclusion of the smoking lobby from tobacco control forums was essential and that there are clear parallels to the fossil fuel lobby. “Bodies that make these decisions should be looking very seriously at who they allow into the policy-making groups and see in whose interests they are talking,” Faulkner says. “And if you do that, of course, you clamp down on the fossil fuel lobby. “There are a number of real examples where industries have huge influence on public policy, to the detriment of the health of the community. “If politicians are serious about saying their first priority is the security and the wellbeing of the community then they’re going about it in a bad way if they allow the fossil fuel lobby to put that at risk.”

Mansur G.,Sharif Medical and Dental College | Tariq N.,Sharif Medical and Dental College | Arooj M.,LMDC | Malik A.,The University of Lahore | And 2 more authors.
Medical Forum Monthly | Year: 2014

Objective: All over the world Hepatitis C virus (HCV) remains to be a main etiological mediator of liver disease. Approximately, 10 million people in Pakistan are diseased with HCV. Pegylated interferon plus ribavirin signifies the gold standard therapy but various side effects may occur. Study Design: Comparative study. Place and Duration of Study: This study was conducted at Jinnah Hospital Lahore from August 2013 to March, 2014. Materials and Methods: Thirty five patients of hepatitis C virus and Twenty three age and sex-matched clinically apparently healthy individuals were eligible for inclusion in the study at Jinnah Hospital Lahore during the year 2013-2014.1.0 ml blood sample were taken and subjected to centrifuge at 3000-4000 rpm for 10-15 minutes for the separation of serum. All the analytical work was performed at the Institute of molecular biology and biotechnology (IMBB), and Centre for research in molecular medicine (CRiMM), The University of Lahore-Pakistan. Results: The estimation of AST, ALT, ALP, TP and T.Bilirubin were estimated. The AST level in HCV patients was increases (47.88±40.49) as compared to the control persons (31.43±7.31) and statistically significant (0.02<0.05). Total Protein level in HCV patients was (4.20±0.61) and in healthy individuals (6.23±0.51) and statistically significant (0.000O.05). MDA level in HCV patients was increases remarkably (8.58±1.19) and in control persons (1.47±0.54) and it was statistically significant (0.000<0.05). Conclusion: There is a relationship between oxidative stress and ALP, ALT, AST and Albumin. The results of the present study confirmed a perfect sketch regarding the circulating biochemical markers and lipid peroxidation (MDA) profile between the studied groups i.e., control and HCV patients with interferon induced Hepatitis C virus infection.

Jamil W.,AIMC | Saleem S.,Physiology | Malik A.,LMDC | Shuja N.,The University of Lahore | And 3 more authors.
Medical Forum Monthly | Year: 2014

Objective: Current study was conducted to determine the fluctuations of various circulating biomarkers including thyroid hormones, hepatic enzymes, oxidative stress markers as well as electrolytes in schizophrenics. Study Design. Cross Sectional Study. Place and Duration of Study: This study was conducted at Psychiatric Clinic of Jinnah Hospital, Mental Hospital from Jan. 2013 to Oct. 2013. Materials and Methods: Seventy five acute schizophrenics and twenty five healthy individuals were selected for this study. Patients with chronic infections, diabetic history, liver disease or any other history of drugs including smoking and/or drinking alcohol were excluded from the study. Results: Elevated levels of oxidative stress in the form of malondialdehyde (MDA) (7.8±2.71∗) were observed in schizophrenics. Similarly raised levels of T3 (6.9±1.31∗) and T4 (61.2±15.44∗) were found in patients as compared to control. Electrolytes like Na, K, Ca and Mg showed alterations in the serum of both patients and control. Conclusion: All the circulating biochemical markers were statistically significant (P<0.05). It is concluded that lipid peroxidation may has association with thyroid hormones and electrolytes. Moreover, alleviated concentration of anti-oxidant biomarkers like SOD, catalase and GSH may play a central role in schizophrenics and anti-oxidant therapy may be useful for the management of this psychiatric disorder.

Sellier A.,LMDC | Vidal T.,LMDC | Cagnon H.,LMDC | Buffo-Lacarriere L.,LMDC | Multon S.,LMDC
Key Engineering Materials | Year: 2016

The objective of this research is to understand the behavior of concrete subjected to temperatures up to 180°C and to gas absolute pressures up to 5 bars applied during the two weeks envisioned in the "loss of coolant accident" (LOCA) scenario. Previous studies about delayed mechanical behavior of concrete have pointed out an increase of delayed strains with the temperature rise: the basic creep can be multiplied by a factor 10 at 80°C, and coupling between creep and heating can lead to damage and to transient thermal creep. These phenomena could be predominant if the LOCA induced conditions are maintained several days and more probably several weeks. So, a model able to predict the cracking and the gas leakages has to be developed. It has to consider these phenomena and their coupling with other possible causes of concrete damage previous to the LOCA. In fact, if the LOCA occurs on structure already damaged by early age cracking or endogenous chemical reactions, such as AAR or ettringite, the leakage risk could be increased. The paper will focus on some important aspects of these phenomena (creep rate dependency on temperature, scale effects at early age, damage induced by swelling reactions), and on their coupling in a finite element model. © 2016 Trans Tech Publications, Switzerland.

This article presents the application of a thermo-hydro-chemo-mechanical (THCM) model to a real complex structure of reactor confinement (mock-up VERCORS from EDF) by taking into account the specificities of the construction (construction consequences), the distributed reinforcements and the material heterogeneity of massive structure. The experimental campaigns were conducted during and after the construction of VERCORS. The early-age behavior of concrete is first modelled based on a multiphasic hydration model to ensure the thermal evolution. Then a 3D mechanical model is used to predict the consequences of hydration, temperature and water variations on mechanical behavior. An alternative approach to consider the structural effect of distributed reinforcement without explicit meshing of reinforcements is implemented and is able to reproduce the influence of reinforcement on the crack patterns. Moreover, the "Weakest link localization" method is also adapted to deal with a probabilistic scale effect due to the material heterogeneity of massive structure. It permits to assess directly the most likely tensile strength which can treat the first crack in softening part of the loaded volume of structures. © 2016 Trans Tech Publications, Switzerland.

Bucher R.,LMDC | Cyr M.,LMDC | Escadeillas G.,LMDC
RILEM Bookseries | Year: 2015

The pozzolanic materials are often recommended for their very good durability in aggressive environment. Unfortunately, this is not always true and particularly in the case of carbonation by the atmospheric CO2. Although cement replacement by pozzolanic materials causes a decrease in pore size, the pozzolanic reaction consumes portlandite and decreases the protection potential against CO2 ingress. This is the case for most pozzolanic materials, including metakaolin. The aim of this study is first to confirm the literature results of carbonation by using flash metakaolin in partial replacement of cements (CEM I, CEM II A-LL and CEM II A-V). Then the concretes with a metakaolin are compared with concretes based on standardized cement in order to assess the carbonation depth of metakaolinbased concretes and concretes used today in the building construction. Even though the cement replacement of CEM I and CEM II A-V by metakaolin increases the carbonation depth, results are not the same with the CEM II A-LL cement. The interaction of metakaolin with the cement limestone filler can explain this better performance, certainly because the hemicarboaluminate allows slowing down the CO2 propagation through the matrix. © RILEM 2015.

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