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Fundamentals and application in phytoremediation of an efficient arsenate reducing bacterium Pseudomonas putida ARS1

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Journal of Environmental Sciences 2024年第3期137卷 237-244页

作者： Ze-Wen Wang Guang Yang Jian Chen Yaoyu Zhou Avelino Nunez Delgado Hui-Ling Cui Gui-Lan Duan barry P.Rosen Yong-Guan Zhu Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450052China State Key Lab of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Department of Cellular Biology and Pharmacology Florida International UniversityHerbert Wertheim College of MedicineMiamiFL33199USA University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China College of Resources and Environment Hunan Agricultural UniversityChangsha 410128China Department of Soil Science and Agricultura Chemistry Engineering Polytechnic SchoolUniversity of Santiago de CompostelaCampus Univ.s/n27002LugoSpain

Arsenic is a ubiquitous environmental ***-mediated arsenic biotransformations significantly infuence arsenic mobility and *** transformations by soil and aquatic organisms have been well documented,while little is known regarding effects due to endophytic *** endophyte Pseudomonas putida ARS1 was isolated from rice grown in arsenic contaminated *** ARS1 shows high tolerance to arsenite(As(Ⅲ))and arsenate(As(V)),and exhibits efficient As(V)reduction and As(Ⅲ)effux *** exposed to 0.6 mg/L As(V),As(V)in the medium was completely converted to As(Ⅲ)by *** ARS1 within 4 *** sequencing showed that *** ARS1 has two chromosomal arsenic resistance gene clusters(arsRCBH)that contribute to efficient As(V)reduction and As(Ⅲ)effux,and result in high resistance to *** globosa is a strong arsenic accumulator with high potential for arsenic phytoremediation,which takes up As(Ⅲ)more efficiently than As(V).Co-culture of *** ARS1 and *** enhanced arsenic accumulation in *** by 69%,and resulted in 91%removal of arsenic(at initial concentration of 0.6 mg/L As(V))from water within 3 *** study provides a promising strategy for in situ arsenic phytoremediation through the cooperation of plant and endophytic bacterium.

关键词： Arsenic Pseudomonas putida Arsenate reduction Endophyte Wolffia globosa Phytoremediation

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Investigation of HCAR2 antagonists as a potential strategy to modulate bovine leukocytes

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1567-1577页

作者： Laman K.Mamedova Kirby C.Krogstad Paiton O.McDonald Laxman Pokhrel Duy H.Hua Evan C.Titgemeyer barry J.Bradford Department of Animal Science Michigan State UniversityEast LansingMichigan 48824USA Department of Animal Sciences and Industry Kansas State UniversityManhattanKS 66506USA Comparative Medicine and Integrative Biology East LansingMI 48824USA Department of Chemistry Kansas State UniversityManhattanKS 66506USA

Background Dairy cows experiencing ketosis after calving suffer greater disease incidence and are at greater risk of leaving the herd. In vitro administration of beta-hydroxybutyric acid(BHBA;the primary blood ketone) has inhibitory effects on the function of bovine leukocytes. BHBA is a ligand of HCAR2 and the activation of these receptors promotes an anti-inflammatory response which may be related with immunosuppression observed in transition dairy cattle. The objective of this study was to identify and test antagonists for HCAR2 in bovine immune cells cultured with *** We observed expression of HCAR2 at the protein level within lymphocytes, monocytes, and granulocytes. The proportion of cells expressing HCAR2 tended to be greater in mid-lactation compared to early lactation cows;the increase was a result of increased proportion of T and B cells expressing HCAR2. Stimulation of HCAR2 with niacin or BHBA promoted Ca^(2+) mobilization in neutrophils and mononuclear cells. Mononuclear cells treated with BHBA had diminished intracellular Ca^(2+) responses when HCAR2 was knocked down by si RNA silencing, indicating Ca^(2+) mobilization was mediated by HCAR2 signaling. Two candidate antagonists for HCAR2, synthesized from niacin(NA-1 and NA-5), were tested;monocytes and neutrophils pre-treated with NA-1 and NA-5 had reduced Ca^(2+) mobilization after incubation with BHBA. Furthermore, NA-5 but not NA-1 prevented BHBA-associated reductions in cyclic *** We demonstrated that HCAR2 is present on bovine leukocytes and has greater expression later in lactation. We confirmed that BHBA and niacin derived HCAR2 antagonists alter bovine leukocyte activity. Our results demonstrate that both BHBA and niacin affect bovine leukocyte Ca^(2+) mobilization in a HCAR2-dependent manner.

关键词： Flow cytometry GPR109A HM74A Ketosis

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Spatial Heterogeneity Modeling Using Machine Learning Based on a Hybrid of Random Forest and Convolutional Neural Network (CNN)

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Journal of Data Analysis and Information Processing 2024年第3期12卷 319-347页

作者： Amadou Kindy barry Anthony Waititu Gichuhi Lawrence Nderu Department of Mathematics Pan African University Institute for Basic Sciences Technology and Innovation (PAUISTI) Nairobi Kenya Department of Statistics and Actuarial Science Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya Department of Computing School and Information Technology (SCIT) Jomo Kenyatta University of Agriculture and Technology (JKUAT) Nairobi Kenya

Spatial heterogeneity refers to the variation or differences in characteristics or features across different locations or areas in space. Spatial data refers to information that explicitly or indirectly belongs to a particular geographic region or location, also known as geo-spatial data or geographic information. Focusing on spatial heterogeneity, we present a hybrid machine learning model combining two competitive algorithms: the Random Forest Regressor and CNN. The model is fine-tuned using cross validation for hyper-parameter adjustment and performance evaluation, ensuring robustness and generalization. Our approach integrates Global Moran’s I for examining global autocorrelation, and local Moran’s I for assessing local spatial autocorrelation in the residuals. To validate our approach, we implemented the hybrid model on a real-world dataset and compared its performance with that of the traditional machine learning models. Results indicate superior performance with an R-squared of 0.90, outperforming RF 0.84 and CNN 0.74. This study contributed to a detailed understanding of spatial variations in data considering the geographical information (Longitude & Latitude) present in the dataset. Our results, also assessed using the Root Mean Squared Error (RMSE), indicated that the hybrid yielded lower errors, showing a deviation of 53.65% from the RF model and 63.24% from the CNN model. Additionally, the global Moran’s I index was observed to be 0.10. This study underscores that the hybrid was able to predict correctly the house prices both in clusters and in dispersed areas.

关键词： Spatial Heterogeneity Spatial Data Feature Selection Standardization Machine Learning Models Hybrid Models

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Thyroidectomy: Frequency and Indications in the General Surgery Department of the Hôpital National Ignace Deen/CHU de Conakry

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International Journal of Otolaryngology and Head & Neck Surgery 2024年第3期13卷 157-167页

作者： Mamadou Sakoba barry Mamadou Mouctar Ramata Diallo Houssein Fofana Vignin Baudouin Kpossou Boubacar barry Aboubacar Touré Aissatou Taran Diallo General Surgery Department H&#244pital National Ignace Deen/CHU de Conakry Conakry Guinea Faculté des Sciences and Techniques de la Sant&#233-Universit&#233 Gamal Abdel Nasser de Conakry Conakry Guinea ENT Department Mamou Regional Hospital Mamou Guinea

Introduction: Thyroidectomy is a surgical procedure to remove all or part of the thyroid gland. The aim of this study was to report the results of thyroidectomy in the general surgery department of the Hôpital national Ignace Deen/CHU de Conakry. Methodology: This was a retrospective study, of seven (07) years (January 1, 2016 - August 31, 2023), in the General Surgery Department of the Ignace Deen National Hospital-CHU in Conakry. We included all records of patients admitted and operated on for thyroidectomy and with up-to-date medical records. The variables were epidemiological, clinical and therapeutic. Results: During the study period, we recorded 3221 cases of surgery, including 40 thyroidectomies (1.24% of cases). The average age was 42.4 years. Women were the most represented, with a sex ratio of 0.16. The reason for consultation was anterior cervical swelling in 86% (n = 25) of cases, followed by signs of cervical compression 21% (n = 6) and signs of thyrotoxicosis 31% (n = 9). Indications for thyroidectomy were dominated by homogeneous goitres in 69% (n = 20) of cases, basedow’s disease in 20.7% (n = 6) and nodular goitres in 6.9% (n = 2) of cases. The surgical procedures were lobo-isthmectomies in 72.4% (n = 21), subtotal thyroidectomies 13.8% (n = 4), total thyroidectomies 10.3% (n = 3). Postoperative follow-up was straightforward in 69% (n = 20). Complications included haemorrhage in 20.7% (n = 6) and recurrence in 6.9% (n = 2). The average hospital stay was 7 days. Conclusion: Thyroidectomy is a relatively frequent surgical procedure in our department. Indications are dominated by homogeneous goitres. Morbidity is related to hemorrhage. Rigorous hemostasis could improve the quality of thyroidectomy.

关键词： Thyroidectomy Indication Ignace Deen

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Design of an Interconnection Architecture and Sizing of Two (2) EPC Core Networks: The Case of Orange-Guinea

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Journal of Energy and Power Engineering 2024年第2期18卷 59-70页

作者： Mamadou Sadigou Diallo Kadiatou Aissatou barry Amadou Lamarana Bah Mamadou Sanoussy Camara Janvier Fotsing Amadou barry Amadou Oury Bah Gamal Abdel Nasser University of Conakry(UGANC) P.O.BOX 1147Conakry 001BP 1147Republic of Guinea National Advanced School of Engineering University of Yaoundé1Yaoundé1001BP 337Republic of Cameroon

With the arrival of the 4G and 5G,the telecommunications networks have experienced a large expansion of these *** enabled the integration of many services and adequate flow,thus enabling the operators to respond to the growing demand of *** rapid evolution has given the operators to adapt,their methods to the new technologies that *** complexity becomes more important,when these networks include several technologies to access different from the heterogeneous network like in the 4G *** dimensional new challenges tell the application and the considerable increase in demand for services and the compatibility with existing networks,the management of mobility intercellular of users and it offers a better quality of ***,the proposed solution to meet these new requirements is the sizing of the EPC(Evolved Packet Core)core network to support the 5G access *** the case of Orange Guinea,this involves setting up an architecture for interconnecting the core networks of Sonfonia and *** objectives of our work are of two orders:(1)to propose these solutions and recommendations for the heart network EPC sizing and the deployment to be adopted;(2)supply and architectural interconnection in the heart network EPC and an existing heart *** our work,the model of traffic in communication that we use to calculate the traffic generated with each technology has link in the network of the heart.

关键词： 5G network 4G network(EPS(evolved packet system)) 3G network(UMTS:Universal Mobile Telecommunications System) EPC network of the heart architecture dimensional Orange Guinea technology service

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The Importance of Uterine Tumors in the Day-to-Day Practice of the General Surgery Department of Ignace Deen National Hospital

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Open Journal of Obstetrics and Gynecology 2024年第7期14卷 1003-1009页

作者： Mamadou Sakoba barry Mariama Camara Aissatou Taran Diallo Aboubacar Touré General Surgery Department Ignace Deen National Hospital/Conakry University Hospital Conakry Guinea Faculty of Health Sciences and Technology Gamal Abdel Nasser University of Conakry Conakry Guinea

Introduction: Uterine tumors are all abnormal cell proliferations developed at the expense of one or more tissue types, which may be located in any uterine segment and have anatomopathological characteristics of benignity or malignancy. The aim of this study was to report on the management of uterine tumors in the general surgery department of Ignace Deen Hospital in Conakry. Methodology: This was a retrospective study lasting five (5) years, from January 1, 2011 to December 31, 2015: All complete records of patients with the diagnosis of a uterine tumor managed in the department were included. Our results are presented in tables and figures. Results: 3200 patients underwent surgery. Among them, 82 cases concerned uterine tumors, i.e. 2% of the department’s overall activity. The average age of our patients was 38.5 years, with extremes of 18 and 59 years. The age group most affected was 41 - 50, with a rate of 39.02%. Housewives and married civil servants were the socio-professional strata most affected, with a predominance of married women. We estimated an increasing proportion of patients admitted to the department during the study period, proving that our study site plays a significant role in the management of uterine tumors. Conclusion: The management of uterine tumors is a major public health problem. Information, communication and education of all socio-professional groups seem necessary.

关键词： Uterine Tumors Management Conakry University Hospital

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Vulvectomy: Indications and Results in the General Surgery Department of the Ignace Deen Chu Hospital in Conakry

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Open Journal of Obstetrics and Gynecology 2024年第4期14卷 560-564页

作者： Camara Mariama barry Mamadou Sakoba Yattara Abdoulaye Touré Aboubacar Department of General Surgery H&#244pital National Ignace Deen Conakry Guinea Faculty of Health Sciences and Technology Gamal Abdel Nasser University of Conakry Conakry Guinea

Introduction: The aim of this study was to report the indications and evaluate the results of vulvectomy in the general surgery department of Ignace Deen Hospital, CHU Conakry. Materials and Methods: This was a retrospective descriptive study, conducted over a period of five (05) years from January 1, 2018 to December 31, 2022, in the general surgery department of Ignace Deen Hospital, CHU Conakry. We included in our study all patient records in whom vulvectomy was performed. Results: We recorded 15 cases of vulvectomy out of 453 perineal surgeries, i.e. 3.31%, with a mean age of 43.56 years and extremes of 35 and 69 years. Vulvar cancer was the most common diagnosis (46.67%), followed by Buschke-Lowenstein (33.33%) and anal canal cancer extending to the vulva (20%). Six patients had undergone biopsy (40%). Vulvectomy with lymph node dissection was performed in only 9 patients (60%), and all surgical specimens were sent to anatomical pathology (100%). Conclusion: Vulvectomy is a surgical technique most often indicated for the treatment of vulvar cancer.

关键词： Vulvectomy Indications Results Ignace Deen Conakry University Hospital

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Cell-cell interactions and communication dynamics in lung fibrosis

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Chinese Medical Journal Pulmonary and Critical Care Medicine 2024年第2期2卷 63-71页

作者： Ting Xie Jiurong Liang barry Stripp Paul W.Noble Division of Pulmonary and Critical Care Medicine Department of MedicineWomen’s Guild Lung InstituteCedars-Sinai Medical CenterLos AngelesCA 90048USA

Cell-cell interactions are essential components of coordinated cell function in lung *** diseases involve altered cell-cell interactions and communication between different cell types,as well as between subsets of cells of the same *** identification and understanding of intercellular signaling in lung fibrosis offer insights into the molecular mechanisms underlying these interactions and their implications in the development and progression of lung fibrosis.A comprehensive cell atlas of the human lung,established with the facilita-tion of single-cell RNA transcriptomic analysis,has enabled the inference of intercellular communications using ligand-receptor *** this review,we provide a comprehensive overview of the modified cell-cell commu-nications in lung *** highlight the intricate interactions among the major cell types within the lung and their contributions to *** insights presented in this review will contribute to a better understand-ing of the molecular mechanisms underlying lung fibrosis and may guide future research efforts in developing targeted therapies for this debilitating disease.

关键词： Cell–cell interaction Lung fibrosis Lung homeostasis Targeted therapies

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Fetal Head Compression: Its Possible Role in Neurologic Injury

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Open Journal of Obstetrics and Gynecology 2024年第1期14卷 124-143页

作者： barry S. Schifrin Brian J. Koos Wayne R. Cohen Department of Obstetrics and Gynecology The Western University of Health Sciences Pomona USA The David Geffen School of Medicine at UCLA Los Angeles USA The University of Arizona College of Medicine Tucson USA

It is widely assumed that fetal ischemic brain injury during labor derives almost exclusively from severe, systemic hypoxemia with marked neonatal depression and acidemia. Severe asphyxia, however, is one of several causes of perinatal neurological injury and may not be the most common;most neonates diagnosed with hypoxic-ischemic encephalopathy do not have evidence of severe asphyxia. Sepsis, direct brain trauma, and drug or toxin exposure account for some cases, while mechanical forces of labor and delivery that increase fetal intracranial pressure sufficiently to impair brain perfusion may also contribute. Because of bony compliance and mobile suture lines, the fetal skull changes shape and redistributes cerebrospinal fluid during labor according to constraints imposed by contractions, and bony and soft tissue elements of the birth canal as the head descends. These accommodations, including the increase in intracranial pressure, are adaptive and necessary for efficient descent of the head while safeguarding cerebral blood flow. Autonomic reflexes mediated through central receptors normally provide ample protection of the brain from the considerable pressure exerted on the skull. On occasion, those forces, which are transmitted intracranially, may overcome the various adaptive anatomical, cardiovascular, metabolic, and neurological mechanisms that maintain cerebral perfusion and oxygen availability, resulting in ischemic brain injury. Accepting the notion of a potentially adverse impact of fetal head compression suggests that avoidance of excessive uterine activity and of relentless pushing without steady progress in descent may offer protection for the fetal brain during parturition. Excessive head compression should be considered in the differential diagnosis of ischemic encephalopathy.

关键词： Fetal Brain Injury Fetal Head Compression Ischemic Encephalopathy Neonatal Encephalopathy

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Causes and Prognosis of Cases of Acute Obstructive Renal Failure Managed at the Donka National Hemodialysis Center

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Open Journal of Nephrology 2024年第2期14卷 136-146页

作者： Amadou Yaya Diallo Mamadou Mouctar Diallo Mamadou Dian barry Kadiatou Mamadou Bobo barry Saikou Oumar Diallo Djenabou Diallo Soriba Bangoura Mamadou Malal Diallo Thierno Mamadou Oury Diallo Mohamed Lamine Kaba Alpha Oumar Bah Department of Nephrology-Hemodialysis CHU Donka Conakry Guinea Faculty of Health Sciences and Techniques Gamal Abdel Nasser University of the Republic of Guinea Conakry Guinea Department of Urology-Andrology CHU Ignace Deen Conakry Guinea

Introduction: Acute obstructive renal failure (AORF) is a frequent clinical situation, secondary to obstruction of the urinary excretory tract. Whatever the cause, urinary tract obstruction suddenly opposes glomerular filtration and is responsible for tubulointerstitial lesions. It accounts for 10% of acute renal failure (ARF). The aim of this study was to identify the causes and prognosis of cases of acute obstructive renal failure managed at the Centre National d’hémodialyse Donka. Material and Methods: This was a prospective descriptive study lasting 6 months, from September 1, 2022 to February 29, 2023. All patients undergoing haemodialysis for acute obstructive renal failure who agreed to participate in the study and whose medical records were complete were included. Results: During the course of the study, we registered 97 haemodialysis patients, including 20 cases (20.62%) of acute obstructive renal failure. The mean age of the patients was 57.8 ± 10.54 years, with a male predominance of 11 cases (55%) and a sex ratio of 1.22. The reasons for consultation were dominated by physical asthenia 11 cases (55%), lumbar pain 9 cases (50%), vomiting 6 cases (30%) and acute urine retention 6 cases (30%). Arterial hypertension 16 cases (80%) and urinary tract infection 10 cases (50%) were the most common antecedents. The etiologies of RAOI were dominated by lithiasis 10 cases (50%), neoplasia 6 cases (30%) and benign prostatic hypertrophy 3 cases (15%). mean creatinine was 1267.60 ± 710.76 μmol/l with extremes of 243 μmol/l and 2822 μmol/l, mean urea was 39.56 ± 18.36, hyperkalemia in 14 cases (70%) and hyponatremia in 8 cases (40%). After hemodialysis, 9 cases (45%) recovered renal function, 4 cases (20%) became chronic and 7 cases (35%) died. Conclusion: The frequency of AKI remains non-negligible in our department, and early detection and prompt management would considerably reduce the morbidity and mortality associated with this pathology.

关键词： Acute Obstructive Renal Failure Hemodialysis Prognosis Donka

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