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Lamprophyre Rocks in the Nassara Gold Deposit, Southwest Burkina Faso: Characteristics and Implication for Mining Exploration

中国化学会第十届全国无机化学学术会议

作者： Yeye Ai Yongguang Li Vivian Wing-Wah yam Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University and Department of Chemistry The University of Hong Kong

More recently, transition metal coordination complexes with unique square-planar structure are explored for the construction of functional materials due to their ability to form intermolecular π-π stacking and metal-metal interactions to induce intriguing luminescence properties.[1,2] Herein, we report a series of L-glutamine-derived alkynylplatinum（Ⅱ） bipyridine complexes with formation of different architectures associated with strong hydrogen bonding, p-p stacking and metal-metal interactions in various solutions. Their aggregation abilities and photophysical properties could be tuned by a rational modification of the molecular structures, as well as changes in solvents and temperature. The as-prepared temperature-sensitive metallogel shows emission characteristics as a result of the alteration of p-p stacking and metal-metal interactions.

关键词： Platinum(Ⅱ) complexes metallogel self-assembly

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Open Journal of Geology 2023年第12期13卷 1291-1311页

作者： Pascal Ouiya Adama Ouédraogo yaméogo Sâga Sawadogo Séta Naba Ecole Normale Supérieure (ENS) Institut Sciences et Technologie (IST) Ouagadougou Burkina Faso Laboratoire Géosciences et Environnement (LaGE) Earth Sciences Department Ouagadougou Burkina Faso University Norbert ZONGO (UNZ) Koudougou Burkina Faso

The lamprophyres are late dykes that cut the formations hosting the gold mineralization in the Nassara deposit. They are geographically and spatially related to most orogenic gold deposits. It is with the aim of characterizing them and seeing their implications for exploration that this work is carried out. To achieve our objective, petrographic studies and chemical analyses of minerals (pyroxenes, amphiboles, feldspars, chromite) and geochemical analyses of total rock were carried out. These studies have enabled us to classify the Nassara lamprophyres as calc-alkaline lamprophyres of the spessartite type. The Cr, Co, Ni and Mg enrichment of these rocks would indicate a depleted mantle source, with LILE enrichment by fluids probably related to metasomatic activity. The various diagrams show that they are depleted in HREE and enriched in LREE. The high Nb/Ta ratios in our data indicate metasomatic activity probably linked to amphibole and rutile in the mantle prior to melting. The geodynamic context of spessartite-type lamprophyres indicates a signature linked to late-orogenic to post-collisional subduction. They are late-orogenic to post-collisional lamprophyres enriched in compatible elements (Cr, Ni, Co) and display a negative Ta-Nb-Ti (TNT) anomaly. The frequent association of these lamprophyre dykes with the deposits does not indicate the source of the gold for these deposits, but rather zones of crustal permeability capable of draining hydrothermal fluids at the time of emplacement. Good mapping of lamprophyre dykes, especially in shear zones, could therefore guide prospecting and identify potential zones of hydrothermal fluid circulation.

关键词： Nassara Calc-Alkaline Lamprophyre Metasomatic Activity LILE HREE LREE

Cyclometalated N^C^N Platinum(Ⅱ) Complexes: Synthesis,Characterization,Electrochemical,Photophysical,and Gelation Behavior Studies

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Cyclometalated N^C^N Platinum(Ⅱ) Complexes: Synthesis,Chara...

Electrocardiography of a Top Athlete in Bobo-Dioulasso, Burkina Faso

中国化学会第八届全国配位化学会议

作者： Yeye Ai Yongguang Li Vivian Wing-Wah yam Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University and Department of Chemistry The University of Hong Kong

Square-planar platinum(Ⅱ)complexes have attracted much attention in recent years due to their intriguing spectroscopic and photophysical behaviors arising from the diversity of the metal-ligand *** platinum(Ⅱ)N^C^N complexes due to the strongerσ-donating effect shows strong luminescence *** a different aspect of their solid-state properties,square-planar platinum(Ⅱ)complexes have been explored to construct ***,we synthesized new series of cyclometalated platinum(Ⅱ)complexes of N^C^N ligands,where N^C^N=1,3-bis(1-n-alkylpyrazol-3-yl)benzene(bpzb),namely,[Pt(bpzb)Cl](1 and 2)and[Pt(bpzb)(C≡C-R)](3-10)(R=CH,CH-OCH-p,CH-NO-p,CH-NH-p,4-cholesteryl phenyl carbamate,and cholesteryl methylcarbamate).Two of the platinum(Ⅱ)complexes were structurally characterized by X-ray crystallography,and short intermolecular C-H···Pt contacts were ***-structured emission bands originating from triplet IL(IL)excited states of the bpzb ligands with mixing of some MLCT[dπ(Pt)→π*(bpzb)]character were observed in solution ***,complex 5 with p-nitrophenylacetylene ligand shows a low-energy emission that is derived from the involvement of the p-nitrophenylethynyl *** 9 with hydrophobic cholesteryl 4-ethynylphenyl carbamate ligand was found to form stable metallogels in several organic solvents,which are responsive to mechanical sonication and thermal stimuli and show circular dichroism activity.

关键词： Platinum(Ⅱ) complexes gelation supramolecular

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World Journal of Cardiovascular Diseases 2019年第7期9卷 449-457页

作者： Somnoma Jean-Baptiste Tougouma Nobila Valentin yaméogo Yibar Kambiré Aimé Arsène yaméogo Samba Sidibé Jonas Koudougou Kologo Georges Millogo Salam Ouédraogo Joel Bamouni Patrice Zabsonré Higher Institute of Health Sciences (INSSA) Nazi Boni University Bobo-Dioulasso Burkina Faso Cardiology Department Sour&ocirc Sanou University Hospital Center Bobo-Dioulasso Burkina Faso Cardiology Department Point G University Hospital Center Bamako Mali Department of Health Sciences University of Ouagadougou Ouagadougou Burkina Faso Department of Health Sciences Polytechnic University of Ouahigouya Ouahigouya Burkina Faso

Elite sport results in electrocardiogram changes. Some are minor, others are likely to cause sudden death. The authors intended to describe the electrocardiogram features of top athletes at rest in Bobo-Dioulasso. This descriptive transversal study was carried out from August 2015 to February 2016 in the cardiology department of CHU Sanou Souro in Bobo-Dioulasso. The study sampled top athletes aged 17 to 35 with at least eight hours’ training per week for more than six months regardless of the type of discipline. Two hundred top-level athletes from 4 sport disciplines were included. The median age of athletes was 24 years (IIQ: 21 -27). The median duration in high level sport was 6 years (IIQ: 4 - 8) and the median length of weekly training sessions was 10 hours (IIQ: 10 - 10). Only 4% of the athletes had already conducted an Electrocardiogram (ECG). ECG abnormalities were reported in 90.5% of cases and sinus bradycardia was the most common abnormality reported in 72.5% of cases. Left ventricular and left atrial hypertrophy were reported in 44% and 34.5% of cases respectively. Early repolarization syndrome was registered in 47% of cases. Practicing top-level sport activity can result in electrical changes with athletes. These changes need to be identified by practitioners so that the can differentiate them from heart diseases.

关键词： Heart High Level Sport Electrocardiogram Characteristics Burkina Faso

Effects of Ving Tsun sticking-hand training on upper-limb sensorimotor performance in community-dwelling middle-aged and older adults: A randomized controlled trial

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International Journal of Nursing Sciences 2020年第1期7卷 29-34页

作者： Joanne W.Y.Chung Shirley S.M.Fong Yang Gao Timothy T.T.yam Yvonne T.C.Chak Joyce C.Y.Leung Thomas K.S.Wong Department of Health and Physical Education Education University of Hong KongHong KongChina School of Nursing and Healthcare Hong Kong Nang Yan College of Higher EducationHong KongChina Hong Kong Martial Arts Institute Hong KongChina School of Public Health University of Hong KongHong KongChina Department of Sport and Physical Education Hong Kong Baptist UniversityHong KongChina Hong Kong Christian Service Hong KongChina School of Nursing and Health Studies Open University of Hong KongHong KongChina Department of Social Work and Social Administration University of Hong KongHong KongChina

Objective:To evaluate the effects of Ving Tsun(VT)sticking-hand training on upper-limb joint position sense and muscular performance in community-dwelling middle-aged and older ***:Thirty-three adults were randomly allocated to either a VT group or a control *** VT group received VT sticking-hand training twice per week for 3 *** were taken before and after the intervention *** primary outcome was elbow-joint repositioning error,which was measured by an elbow-joint passive positioning and active repositioning test using a universal *** outcomes were upper-limb muscles'peak force and time taken to reach peak force as measured by a hand-held ***:No significant time,group or time-by-group interaction effects were found for elbow-joint repositioning error or upper-limb muscle peak force *** flexor time to peak force decreased by 33.8%from pre-test to post-test in the VT group(P=0.007).Shoulder abductor,internal and external rotator,and elbow extensor times to peak force decreased by 30.0%-35.9%in the VT%roup(P<0.05)and by 30.4%-37.1%in the control group(P<0.05).Conclusions:VT sticking-hand training does not improve elbow-joint position sense or the maximum strength of upper-limb muscles in middle-aged and older ***,VT can improve shoulder flexor muscles'time to reach peak force in these *** had no obvious effect on the time required to reach peak force in other shoulder muscles and elbow extensors.

关键词： Aged Exercise movement techniques Joint position sense Middle aged Muscle strength Upper extremities

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疯牛病给人类带来的损失

科学（中文版） 2001年第8期284卷 6-7页

作者： yam,Phillp 郑忆石

起初，疾病使人焦虑和沮丧。此后不久，患者出现步态摇摆不稳和自我控制不可靠的症状。在几个月的时间内，患者记忆丧失、并且认不出熟悉的面孔。然后，患者的躯体和精神状况持续恶化，最终死亡。除了病程在大约1年之内结束，以及患者... 详细信息

起初，疾病使人焦虑和沮丧。此后不久，患者出现步态摇摆不稳和自我控制不可靠的症状。在几个月的时间内，患者记忆丧失、并且认不出熟悉的面孔。然后，患者的躯体和精神状况持续恶化，最终死亡。除了病程在大约1年之内结束，以及患者的平均年龄为29岁以外，根据以上症状，你或许会认为，病人患了阿尔茨海默病。只有通过尸体解剖，通过原为脑组织的一团海绵状物质，才能证明患者是死于克罗伊茨费尔特-雅各布病(vCJD)，——也就是令人恐惧的所谓人类疯牛病。

关键词：疯牛病人类灾难 VCJD

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中国钢铁业用润滑剂的增长

国际冶金设备和技术 2010年第2期 20-22页

作者： yam-Chew Oh

当中国继续保持全球钢铁生产的主导地位时，壳牌（Shell）公司正集中全力扩大在中国的市场。根据壳牌公司预测，今年中国钢铁市场润滑剂的需求量至少在24．6万吨，因此，公司继续把重点放在这一巨大的市场上。

关键词：润滑剂钢铁业中国壳牌公司钢铁生产市场需求量

A SMALL SIZED DUPLEXER FOR MOBILE RADIO PHONE SYSTEM

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A SMALL SIZED DUPLEXER FOR MOBILE RADIO PHONE SYSTEM

2nd International Symposium on Recent Advances in Microwave Technology(ISRAMT’89)

作者： WONG SIU-KEUNG yam YU-ON P.C.L.YIP DEPT.OF ELECTRONIC ENGINEERING CITY POLYTECHNIC OF HONGKONGHONGKONG

＜正＞A duplexer for mobile radio phone in 800-900MHz is designed and *** filters are of Butterworth response and helical resonators are used for small sized and low production cost.A trap resonator is used to improve...

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材料科学发展趋势：给塑料布线

科学（中文版） 1995年第11期 40-46页

作者： yam,P 郭凯声

Case Study for Undetermined Mosquito Species by Polymerase Chain Reaction in Western Burkina Faso

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