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Integration of Green Hydrogen Production and Storage via Electrocatalysis

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Precision Chemistry 2024年第6期2卷 229-238页

作者： Chao Zhang Jingxiang low Yujie Xiong Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Precision and Intelligent ChemistrySchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhui 230026China

Hydrogen economy,which proposes employing hydrogen to replace or supplement the current fossil-fuel-based energy economy system,is widely accepted as the future energy scheme for the sustainable and green development of human *** the hydrogen economy has shown tremendous potential,the associated challenges with hydrogen production and storage remain significant barriers to wide *** light of this consideration,the integration of green hydrogen production and storage through electrocatalysis for direct production of chemical hydrogen storage media has emerged as a potential solution to these ***,through electrocatalysis,CO_(2) and H_(2)O can be converted into methanol or formic acid,while N_(2) or NOx along with H_(2)O can be transformed into ammonia,streamlining the hydrogen economy *** this Perspective,we provide an overview of recent developments in this ***,we briefly discuss the general properties and corresponding production strategies via the electrolysis of these chemical hydrogen storage ***,we conclude by offering insights into future perspectives in this field,anticipating that the successful advancement of such technology will propel the development of the hydrogen economy toward practical implementation.

关键词： Hydrogen economy Electrocatalysis Methanol Formic acid Ammonia

Parallelization of frequency domain quantum gates:manipulation and distribution of frequency-entangled photon pairs generated by a 21 GHz silicon microresonator

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Advanced Photonics 2024年第3期6卷 60-69页

作者： Antoine Henry Dario A.Fioretto Lorenzo M.Procopio Stéphane Monfray Frédéric Boeuf Laurent vivien Eric Cassan Carlos Alonzo-Ramos Kamel Bencheikh Isabelle Zaquine Nadia Belabas Institut Polytechnique de Paris LTCI Université Paris-Saclay CNRS Centre for Nanosciences and Nanotechnology Weizmann Institute of Science STMicroelectronics SAS

Harnessing the frequency dimension in integrated photonics offers key advantages in terms of scalability, noise resilience, parallelization, and compatibility with telecom multiplexing *** ring resonators have been used to generate frequency-entangled states through spontaneous four-wave mixing. However, state-of-the-art integrated resonators are limited by trade-offs among size,spectral separation, and efficient photon pair generation. We have developed silicon ring resonators with a footprint below 0.05 mm2providing more than 70 frequency channels separated by 21 GHz. We exploit the narrow frequency separation to parallelize and independently control 34 single qubit-gates with a single set of three off-the-shelf electro-optic devices. We fully characterize 17 frequency-bin maximally entangled qubit pairs by performing quantum state tomography. We demonstrate for the first time, we believe, a fully connected five-user quantum network in the frequency domain. These results are a step towards a generation of quantum circuits implemented with scalable silicon photonics technology, for applications in quantum computing and secure communications.

关键词： frequency domain integrated photonics quantum gates quantum networks

Red Envelopes: Opening a Legacy

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China Report ASEAN 2024年第4期9卷 56-57页

作者： [Malaysia]low Qianfang 不详

University application season left many of my peers adrift or overwhelmed,but I had steadfastly been pointed in the right *** sense of direction was instilled in me by my grandfather,low King *** he passed away when I was only three,my grandpa remains a towering figure of respect in my *** that tender age,I couldn’t grasp the finality of his *** I knew was that Grandpa lay still in the coffin,unresponsive to my cries,no matter how hard I *** from crying,I fell *** a dream,Grandpa hugged me tightly,as he always did,urging me to eat well,grow up strong,and be happy every *** embrace inexplicably brought more tears.

关键词： dream Grand tears

Elevated brain temperature under severe heat exposure impairs cortical motor activity and executive function

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Journal of Sport and Health Science 2024年第2期13卷 233-244页

作者： Xiang Ren Tan Mary C.Stephenson Sharifah Badriyah Alhadad Kelvin W.Z.Loh Tuck Wah Soong Jason K.W.Lee Ivan C.C.low Health and Social Sciences Singapore Institute of TechnologySingapore 138683Singapore Human Potential Translational Research Programme Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117597Singapore Centre for Translational Magnetic Resonance Research Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117549Singapore Department of Physiology Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117593Singapore Heat Resilience and Performance Centre Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117510Singapore N.1 Institute for Health National University of SingaporeSingapore 117456Singapore Campus for Research Excellence and Technological Enterprise(CREATE) Singapore 138602Singapore

Background:Excessive heat exposure can lead to hyperthermia in humans,which impairs physical performance and disrupts cognitive *** heat is a known physiological stressor,it is unclear how severe heat stress affects brain physiology and ***:Eleven healthy participants were subjected to heat stress from prolonged exercise or warm water immersion until their rectal temperatures(T_(re))attained 39.5℃,inducing exertional or passive hyperthermia,*** a separate trial,blended ice was ingested before and during exercise as a cooling *** were compared to a control condition with seated rest(normothermic).Brain temperature(T_(br)),cerebral perfusion,and task-based brain activity were assessed using magnetic resonance imaging ***:T_(br)in motor cortex was found to be tightly regulated at rest(37.3℃±0.4℃(mean±SD))despite fluctuations in T_(re).With the development of hyperthermia,T_(br)increases and dovetails with the rising T_(re).Bilateral motor cortical activity was suppressed during high-intensity plantarflexion tasks,implying a reduced central motor drive in hyperthermic participants(T_(re)=38.5℃±0.1℃).Global gray matter perfusion and regional perfusion in sensorimotor cortex were reduced with passive *** function was poorer under a passive hyperthermic state,and this could relate to compromised visual processing as indicated by the reduced activation of left lateral-occipital ***,ingestion of blended ice before and during exercise alleviated the rise in both T_(re)and T_(bc)and mitigated heat-related neural ***:Severe heat exposure elevates T_(br),disrupts motor cortical activity and executive function,and this can lead to impairment of physical and cognitive performance.

关键词： Brain functional activity Cognition Heat stress Hyperthermia Motor function

Neurological Manifestations of Vitamin B12 Deficiency: About a Case

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Neuroscience & Medicine 2024年第1期15卷 51-54页

作者： Emmanuel Yangatimbi Duval Lewis Grenaba Josué Pierre Kinima Larissa Kpengougna Jacqueline Tchebemou Caprice vivien Ndouellet Pascal Mbelesso Department of Neurology University Hospital of the Sino-Central African Friendship Bangui Central African Republic Faculty of Health Sciences University of Bangui Bangui Central African Republic

The authors report a case of deficient sensory neuropathy secondary to vitamin B12 deficiency, diagnosed in the neurology department of the Sino-Central African Friendship University Hospital in Bangui. The diagnosis was made possible by electroneuromyography which showed subclinical neurological damage associated with hematological damage (anemia). Through this observation, we recall the diagnostic criteria of the disease in a context of difficult medical practice. .

关键词： Neurological Manifestations Vitamins B12 Central African Republic

Abiotic Factors Associated with Abundance Dynamics and Antibiotic Multidrug Resistance of Escherichia coli and Enterococcus faecalis Isolated from Some Ombessa Aquatic Systems (Central Cameroon Region)

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Journal of Geoscience and Environment Protection 2024年第9期12卷 335-369页

作者： Lucie Leme Banock Blandine Pulchérie Tamatcho Kweyang Fabrice Ezo’o Mengo Stephane Arthur Noah Eric Donald Mbo Zang Olive vivien Noah Ewoti Laboratory of Hydobiology and Environment Department of Animal Biology and Physiology Faculty of Sciences University of Yaounde 1 Yaounde Cameroon Laboratory of Microbiology of Soil and Environment Department of Microbiology Faculty of Sciences University of Yaounde 1 Yaounde Cameroon

The present study conducted in the town of Ombessa aims to assess the influence of abiotic factors on the abundance dynamics and antibiotic susceptibility of Escherichia coli and Enterococcus faecalis isolated from some aquatic systems from February to July 2022, monthly samples were taken at 10 water points used by the population (8 groundwater points and 2 surface water points). Samples were analyzed for physico-chemical parameters such as temperature, pH, electrical conductivity. Bacteriological variables such as BHAM, E. coli and E. faecalis abundances were also assessed. Antibiotic susceptibility of E. coli and E. faecalis was assessed using 06 antibiotics using the Kirby-Bauer diffusion disk method. The results show that bacterial abundances were the highest in surface waters. Bacterial densities were the highest in May and the lowest in February. The average densities recorded were 3845 CFU/100mL for BHAM, 380 CFU/100mL for E. coli and 14 CFU/100mL for E. faecalis in groundwater;and 8583 CFU/100mL for BHAM, 6878 CFU/100mL for E. coli and 812 CFU/100mL for E. faecalis in surface water. Antibiotic susceptibility tests showed that these bacterial species are sensitive to Gentamicin, Chloramphenicol, Azithromycin and Ciprofloxacin. They are all resistant to Trimethoprim/Sulfamethoxazole, E. coli is resistant to Doxycycline and E. faecalis has an intermediate sensitivity to Gentamicin. Overall, the Multiresistance to Antibiotics (MRA) indices obtained were above 0.2, indicating the presence of multidrug resistance in bacterial communities. The physico-chemical properties of the water varied over time and space, but on the whole remained below the threshold values of WHO guidelines. The degree of linkage between abiotic water variables and bacteriological parameters has shown that bacterial densities are more abundant in rainy seasons and increased O2 levels favor bacterial growth, while TSS, CO2 and dissolved nitrate levels affect the sensitivity of these bacteria

关键词： Bacterial Abundance Multiresistance Abiotic Aquatic

High-speed silicon photonic electro-optic Kerr modulation

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Photonics Research 2024年第1期12卷 51-60页

作者： JONATHAN PELTIER WEIWEI ZHANG LEOPOLD VIROT CHRISTIAN LAFFORGUE LUCAS DENIEL DELPHINE MARRIS-MORINI GUY AUBIN FARAH AMAR DENH TRAN XINGZHAO YAN CALLUM G.LITTLEJOHNS CARLOS ALONSO-RAMOS KE LI DAVID J.THOMSON GRAHAM REED LAURENT vivien University Paris-Saclay CNRSCentre for Nanoscience and Nanotechnology(C2N)Palaiseau 91120France University Grenoble Alpes CEALETIGrenoble 38000France Optoelectronics Research Centre Zepler Institute for Photonics and NanoelectronicsFaculty of Engineering and Physical SciencesUniversity of SouthamptonSouthampton SO171BJUK

Silicon-based electro-optic modulators contribute to easing the integration of high-speed and low-power consumption circuits for classical optical communications and data *** the plasma dispersion modulation,an alternative solution in silicon is to exploit the DC Kerr effect,which generates an equivalent linear electro-optical effect enabled by applying a large DC electric *** some theoretical and experimental studies have shown its existence in silicon,limited contributions relative to plasma dispersion have been achieved in high-speed modulation so *** paper presents high-speed optical modulation based on the DC Kerr effect in silicon PIN *** contributions of both plasma dispersion and Kerr effects have been analyzed in different waveguide configurations,and we demonstrated that the Kerr induced modulation is dominant when a high external DC electric field is applied in PIN ***-speed optical modulation response is analyzed,and eye diagrams up to 80 Gbit/s in NRZ format are obtained under a *** of 30 *** work paves the way to exploit the Kerr effect to generate high-speed Pockels-like optical modulation.

关键词： waveguide dispersion effect

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新加坡创新农业梦濒临破灭

商业周刊（中文版） 2024年第13期 30-32页

作者： Audrey Wan low De Wei 程玺(译) 不详

过去几年对本土农业创业公司的投资骤减,加之高昂成本和层层审批,阻碍了新加坡农业发展.以多数标准衡量,卡尔蒂克·拉詹(Karthik Rajan)的新加坡农场都是成功的。其LivFresh农场位于这座岛屿北部,占地两公顷,2022年开始为各大超市供应... 详细信息

过去几年对本土农业创业公司的投资骤减,加之高昂成本和层层审批,阻碍了新加坡农业发展.以多数标准衡量,卡尔蒂克·拉詹(Karthik Rajan)的新加坡农场都是成功的。其LivFresh农场位于这座岛屿北部,占地两公顷,2022年开始为各大超市供应菠菜、生菜及其他亚洲绿叶蔬菜。该公司已在2024年3月盈利。尽管如此,它仍有可能在2024年底前倒闭。

关键词：农业创业绿叶蔬菜超市新加坡高昂成本

RED ENVELOPES: OPENING A LEGACY

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