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Search Results: 1 - 10 of 223809 matches for " R Darré "
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A new Robertsonian translocation in Blonde d'Aquitaine cattle, rob(4;10)
I Bahri-Darwich, EP Cribiu, HM Berland, R Darré
Genetics Selection Evolution , 1993, DOI: 10.1186/1297-9686-25-5-413
A pericentric inversion of chromosome 4 in pigs
A Ducos, A Pinton, A Séguéla, HM Berland, MF Blanc, A Darré, P Pinton, M Yerle, R Darré
Genetics Selection Evolution , 1997, DOI: 10.1186/1297-9686-29-3-383
A new Robertsonian translocation in Holstein-Friesian cattle
A Pinton, A Ducos, HM Berland, A Séguéla, MF Blanc, A Darré, S Mimar, R Darré
Genetics Selection Evolution , 1997, DOI: 10.1186/1297-9686-29-4-523
Controlled release of cisplatin and cancer cell apoptosis with cisplatin encapsulated poly(lactic-co-glycolic acid) nanoparticles  [PDF]
A. Champa Jayasuriya, Anthony J. Darr
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.65074

The goal of the present study is to utilize cis-diamminedichloroplatinum (cisplatin) loaded polymer nanoparticles (NPs) to give a controlled, extended, and local drug therapy for the treatment of cancer. We have used biodegradable and biocompatible poly(lactic-co-glycolic acid) (PLGA) to prepare the NPs by adjusting the double emulsion technique using poly(vinylalcohol) as a surface active agent. The PLGA NPs were characterized for particle size and shape, controlled release of cisplatin, and degradation. Cisplatin solubility in deionized water was increased up to 4 mg/mL by simply changing the solution parameters. Cisplatin encapsulated NPs were incubated in phosphate buffered saline (PBS) at 37?C to study the release kinetics of cisplatin. Cisplatin was released in a sustained manner with less than 20% release during a 3-day period followed by 50% release during a 21-day period. A degradation study of PLGA NPs demonstrated the loss of spherical shape during a 21-day period. We also examined the cisplatin sensitive A2780 cell apoptosis when cells were incubated with cisplatin encapsulated PLGA NPs. A large number of cell apoptosis occurred as a result of cisplatin release from the PLGA NPs. These results suggest that cisplatin encapsulated PLGA NPs can be used to treat the cancer cells by injecting them into a localized site minimizing the side effects.

Une nouvelle translocation robertsonienne chez les bovins
R Darré, Hélène-Marie Berland, G Quéinnec
Genetics Selection Evolution , 1974, DOI: 10.1186/1297-9686-6-3-297
Cytogenetic investigation in Saanen and Alpine artificial insemination bucks. Identification of a Robertsonian translocation
E Guillemot, F Gary, HM Berland, V Durand, R Darré, EP Cribiu
Genetics Selection Evolution , 1991, DOI: 10.1186/1297-9686-23-5-449
Recent Developments in Solar Energy Harvesting and Photocatalysis
Junwang Tang,Songyuan Dai,Jawwad A. Darr
International Journal of Photoenergy , 2012, DOI: 10.1155/2012/580746
Ultrasound-Guided Core Needle Biopsy of Breast Lesions: Results and Usefulness in a Low Income Country  [PDF]
Mazamaesso Tchaou, Tchin Darré, Pihou Gbandé, Massaga Dagbé, Akila Bassowa, Lantam Sonhaye, Lama-Kegdigoma Agoda-Koussema
Open Journal of Radiology (OJRad) , 2017, DOI: 10.4236/ojrad.2017.74023
Abstract: Background: Core needle biopsy (CNB) under ultrasound guidance is an accepted standard of care for the diagnosis of breast lesions. It is safe, cost-effective and minimally invasive compared with surgical excision. Objective: The aim of this study was to evaluate the CNB’s results regarding the procedure, complications, histopathological findings and their correlation with the imaging data and surgical histopathological findings. Method: A cross-sectional prospective and descriptive study of a consecutive series of ultrasound-guided CNB of breast lesions in women conduced from January 2015 to December 2016 at the Sylvanus Olympio university hospital of Lomé, in Togo. Results: There were 72 CNB performed under ultrasound guidance in women; from which 54 were retained for the study. The mean age was 44.9 years ± 9.8. 11.1% had a family history of breast cancer. Lesions were most often palpable (90.7%). They were located in the left breast in 54.7%. Lesions were categorized probably malignant or malignant (Birads 4 and 5) in 70.4% and probably benign (Birads 3) in 29.6%. Their mean size was 24.8 mm ± 7.6 at ultrasound. There were no major complications during the procedure. One CNB (1.9%) considered inconclusive was repeated. Histologically, invasive ductal carcinoma (61.1%) was the most common lesion. Fifty-three women underwent surgical procedure and histopathological confirmation. Ultrasound-guided CNB had a sensitivity of 97.5%, specificity of 100%, positive predictive value of 100%, negative predictive value of 92.8%, and an overall diagnostic accuracy of 98.1%. Breast Imaging Reporting and Data System (Birads) categorization had a sensitivity of 94.8%, specificity of 100%, positive predictive value of 100%, negative predictive value of 87.4%, and diagnostic accuracy of 96.2%. Conclusion: Ultrasound guided CNB represent accurate methods for the characterization of breast lesions, with high values of diagnostic accuracy, sensitivity, specificity and negative predictive value. It does not involve a major complication, even in tropical environments.
The Effects of Particle Size, Different Corn Stover Components, and Gas Residence Time on Torrefaction of Corn Stover
Dorde Medic,Matthew Darr,Ajay Shah,Sarah Rahn
Energies , 2012, DOI: 10.3390/en5041199
Abstract: Large scale biofuel production will be possible only if significant quantities of biomass feedstock can be stored, transported, and processed in an economic and sustainable manner. Torrefaction has the potential to significantly reduce the cost of transportation, storage, and downstream processing through the improvement of physical and chemical characteristics of biomass. The main objective of this study was to investigate the effects of particle size, plant components, and gas residence time on the production of torrefied corn ( Zea mays) stover. Different particle sizes included 0.85 mm and 20 mm. Different stover components included ground corn stover, whole corn stalk, stalk shell and pith, and corn cob shell. Three different purge gas residence times were employed to assess the effects of interaction of volatiles and torrefied biomass. Elemental analyses were performed on all of the samples, and the data obtained was used to estimate the energy contents and energy yields of different torrefied biomass samples. Particle density, elemental composition, and fiber composition of raw biomass fractions were also determined. Stalk pith torrefied at 280 °C and stalk shell torrefied at 250 °C had highest and lowest dry matter loss, of about 44% and 13%, respectively. Stalk pith torrefied at 250 °C had lowest energy density of about 18–18.5 MJ/kg, while cob shell torrefied at 280 °C had the highest energy density of about 21.5 MJ/kg. The lowest energy yield, at 59%, was recorded for stalk pith torrefied at 280 °C, whereas cob and stalk shell torrefied at 250 °C had highest energy yield at 85%. These differences were a consequence of the differences in particle densities, hemicellulose quantities, and chemical properties of the original biomass samples. Gas residence time did not have a significant effect on the aforementioned parameters.
Outdoor Storage Characteristics of Single-Pass Large Square Corn Stover Bales in Iowa
Ajay Shah,Matthew J. Darr,Keith Webster,Christopher Hoffman
Energies , 2011, DOI: 10.3390/en4101687
Abstract: Year-round operation of biorefineries can be possible only if the continuous flow of cellulosic biomass is guaranteed. If corn ( Zea mays) stover is the primary cellulosic biomass, it is essential to recognize that this feedstock has a short annual harvest window (≤1–2 months) and therefore cost effective storage techniques that preserve feedstock quality must be identified. This study evaluated two outdoor and one indoor storage strategies for corn stover bales in Iowa. High- and low-moisture stover bales were prepared in the fall of 2009, and stored either outdoors with two different types of cover (tarp and breathable film) or within a building for 3 or 9 months. Dry matter loss (DML), changes in moisture and biomass compositions (fiber and ultimate analyses) were determined. DML for bales stored outdoor with tarp and breathable film covers were in the ranges of 5–11 and 14–17%, respectively. More than half of the total DML occurred early during the storage. There were measurable differences in carbon, hydrogen, nitrogen, sulfur, oxygen, cellulose, hemi-cellulose and acid detergent lignin for the different storage treatments, but the changes were small and within a narrow range. For the bale storage treatments investigated, cellulose content increased by as much as 4%s from an initial level of ~41%, hemicellulose content changed by ?2 to 1% from ~34%, and acid detergent lignin contents increased by as much as 3% from an initial value of ~5%. Tarp covered bales stored the best in this study, but other methods, such as tube-wrapping, and economics need further investigation.
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