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Recent Advances in the Synthesis and Polymerization of New CO_(2)-Based Cyclic

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Chinese Journal of Chemistry 2024年第4期42卷 430-443页

作者： Matteo Lanzi Arjan W.Kleij Institute of Chemical Research of Catalonia(ICIQ) The Barcelona Institute of Science and Technology(BIST)Av.Països Catalans 1643007 TarragonaSpain Catalan Institute of Research and Advanced Studies(ICREA) Pg.Lluís Companys 2308010 BarcelonaSpain

Carbon dioxide can be converted into functional heterocycles known as cyclic carbonates,whose recent reactivity has been expanded towards the formation of tailor-made engineering *** minireview gives an overview of the most topical developments in this area with a special focus on the synthetic methods employed to prepare these CO_(2)based *** addition,their application potential in the area of polymer science using a variety of polymerization techniques is discussed that have in common the ring-opening of the carbonate *** perspectives are provided that provide impetus for the scientific communities aligning research to the use of sustainable processes for polymers from recyclable carbon sources such as CO_(2).

关键词： Carbon dioxide Cyclic carbonates Functional macromolecules Heterocycles Polycarbonates Recycling Ring opening polymerization

Solution of the Center Problem for a Class of Polynomial Differential Systems

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1685-1696页

作者： Chang Jian Liu Jaume Llibre Rafael Ramírez Valentín Ramírez School of Mathematics(Zhuhai) Sun Yat-sen UniversityZhuhai519086P.R.China Departament de Matemàtiques Universitat Autònoma de Barcelona08193BellaterraBarcelonaCataloniaSpain Departament d’Enginyeria Informàtica i Matemàtiques Universitat Rovira i VirgiliAvinguda dels Paiïsos Catalans 2643007TarragonaCataloniaSpain

Consider the polynomial differential system of degree m of the form x=-y(1+μ(a_(2)x-a_(1)y))+x(v(a_(1)x+a_(2)y)+Ω_(m-1)(x,y)),y=x(1+μ(a_(2)x-a_(1)y))+y(v(a_(1)x+a_(2)y)+Ω_(m-1)(x,y)),whereμandνare real numbers such that(μ^(2)+v^(2))(μ+v(m-2))(a_(1)^(2)+a_(2)^(2))≠m>2 andΩ_(m−1)(x,y)is a homogenous polynomial of degree m−1.A conjecture,stated in *** Equations 2019,suggests that whenν=1,this differential system has a weak center at the origin if and only if after a convenient linear change of variable(x,y)→(X,Y)the system is invariant under the transformation(X,Y,t)→(−X,Y,−t).For every degree m we prove the extension of this conjecture to any value ofνexcept for a finite set of values ofμ.

关键词： Center problem polynomial differential system

Oncofertility:Treatment options from bench to bedside

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Cancer Pathogenesis and Therapy 2023年第4期1卷 284-289页

作者： Divya Gupta Shubham Singh Sangeeta Shukla Sadhana Shrivastava Reproductive Biology and Toxicology Lab SOS in ZoologyJiwaji UniversityGwaliorMadhya Pradesh 474011India Department of zoology Guru Ghasidas VishwavidyalayaBilaspur(C.G.)495009India

In recent years,there has been continuous improvement in the treatment and diagnosis of cancer,which has led to a significant improvement in the survival rate of cancer *** that include chemotherapy,radiotherapy,surgery,or combined therapy have several side effects that may lead to premature ovarian insufficiency in females or substantial male germ cell *** biologists recommend that all patients who are diagnosed with a malignant tumor must undergo a consultation for fertility protection and *** this review,we discuss the background knowledge,methods,and options for fertility preservation and how these new strategies help oncologists,surgeons,pediatricians,and hematologists,conserve fertility and be aware of the concepts,methods,and importance of fertility *** review may aid in the advancement of novel personalized methods for fertility preservation according to patients’conditions.

关键词： Cancer Fertility preservation Embryo cryopreservation Oncofertility

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“六个坚持”助力人力资源服务业突破发展

山东人力资源和社会保障 2024年第9期 46-47页

作者：孙萌隋英敏中国烟台sos儿童村烟台市人力资源和社会保障局

人力资源服务业作为生产性服务业的一个重要组成部分，在现代服务行业中具有代表性，它可以围绕劳动者的就业、职业生涯发展，向各类用人单位提供全产业链的人力资源服务，是商务服务业中的新兴专业门类。近年来，烟台市坚持市场化引导...

人力资源服务业作为生产性服务业的一个重要组成部分，在现代服务行业中具有代表性，它可以围绕劳动者的就业、职业生涯发展，向各类用人单位提供全产业链的人力资源服务，是商务服务业中的新兴专业门类。近年来，烟台市坚持市场化引导、产业化集聚、信息化支撑、专业化领航，完善人力资源服务业发展体系，深耕人力资源产业园建设，构筑服务经济社会发展的新动能新优势。坚持政府主导，构建同向发力的组织体系。

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One-pot synthesis of silver nanocomposites from Achyranthes aspera:An eco-friendly larvicide against Aedes aegypti L.

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Asian Pacific Journal of Tropical Biomedicine 2020年第2期10卷 54-64页

作者： Aarti Sharma Pushplata Tripathi Sarita Kumar Department of Life Sciences(sos) Indira Gandhi National Open UniversityMaidan GarhiNew Delhi 110068India Department of zoology Acharya Narendra Dev CollegeUniversity of DelhiKalkaJiNew Delhi 110019India

Objective:To formulate silver nanocomposites from Achyranthes aspera leaf extracts and evaluate its larvicidal activity against Aedes ***:The silver nanocomposites were synthesized from Achyranthes aspera leaf *** process was optimized and traced through UV-visible and photon correlation *** larvicidal potential of silver nanocomposites of Achyranthes aspera leaf extracts was assessed against the early fourth instars of Aedes aegypti and three non-target ***,the most effective and eco-safe nanocomposite was characterized by different biophysical techniques including scanning electron microscopy(SEM),energy dispersive X-ray(EDX)spectroscopy,transmission electron microscopy(TEM),X-ray diffraction(XRD)and Fourier transform-infrared spectroscopy(FT-IR).Results:The formulated silver nanocomposites exhibited efficient larvicidal efficacy against Aedes *** with silver nanocomposites formulated using different Ag NO3 concentrations(3,4,and 5 m M)revealed respective LC50 values of 37.570,6.262 and 1.041μg/m L;5.819,1.412 and 0.489μg/m L;and 5.519,1.302 and 0.267μg/m L after 24,48 and 72 *** silver nanocomposites with 4 m M Ag NO3 were selected for *** and TEM analysis revealed spherical,poly-dispersed structure with varied diameters of 1-25 *** XRD analysis established the crystalline and face-centred-cubic structure of silver nanocomposites with the maximum peak at a 2θvalue of 37.42°.The EDX pattern showed the presence of Ag,O and C in the nanocomposites in their order of weight%.The FT-IR displayed visibly distinct peaks in different ranges demonstrating the intricacy of silver *** addition,the lethal concentrations of silver nanocomposites of Achyranthes aspera leaf extracts against Aedes aegypti larvae were non-toxic to non-target organisms including Gambusia affinis,Daphnia magna and Moina ***:Silver nanocomposites synthesized with leaf extract of Achy

关键词： Achyranthes aspera Aedes aegypti Larvicidal Silver nanocomposites SEM-TEM EDX XRD FT-IR

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职业妈妈——一位sos儿童村妈妈的自述

中国社会导刊 2002年第6期 47-48页

作者：喻尘天津sos村

上小学的儿子说,有妈的孩子未必是宝,没妈的孩子不一定是草,关键在于妈妈是什么样的妈妈,家是什么样的家。妈妈应该是什么样的?没生过孩子的晋朝荣不知道,sos儿童村的妈妈不知道,因为按村规,当儿童村妈妈的前提是未育。

关键词：儿童村 sos

The importance of different forms of prevention in travel medicine

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Asian Pacific Journal of Tropical Medicine 2010年第1期3卷 74-77页

作者： Peter Felkai sos Hungary Medical Service Szentendrei ut 301 BudapestHungaryH-1039

The Asia-Pacific region is becoming an increasingly popular destination for holidaymakers and business *** the seductive tourist attractions and the growing financial importance of the region,infectious diseases have unfortunately repeatedly caused major epidemics in the *** area includes various geographical situations from high mountains to the subtropical and monsoon forests,dry deserts and *** travel medicine specialist’s task is to decrease the various risk of travel to the *** diseases,extreme temperatures and marine hazards could be almost entirely prevented by primary prevention forms of travel medicine such as vaccination,chemoprophylaxis and pretravel *** are some high-risk groups(e.g.,elderly people,backpackers,families with children,adventure travelers) among the growing number of ***,the increased numbers of such travelers result in a rising incidence of travelrelated illnesses and *** those groups,primary prevention sometimes is not enough. The pretravel medical check up,specialists’ consultations and treatment,as forms of secondary prevention,are also essential in travel *** who suffer from serious illnesses or who have accidents must often be repatriated."State-of-the-art repatriation",as a special form of tertiary prevention of travel medicine will play an important role in the future and is direcdy related to effective travel insurance,which could help in providing good medical care to the patients even far from their *** levels,methods and importance of prevention in travel medicine are discussed in this article.

关键词： Travel medicine Preventive medicine Graduate education Medical assistance Pretravel advice Travel-related illness Prexisting disease Emporiatrics

ANTIOXTOATIVE EFFICACY OF PROPOLIS EXTRACT AGAINST OXIDATIVE DAMADE INDUCED BY CARBON TETRACHLORIDE

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ANTIOXTOATIVE EFFICACY OF PROPOLIS EXTRACT AGAINST OXIDATIVE...

Identification of boundary surfaces in flows

第十五届国际药理学大会

作者： Monika Bhadauria Sangeeta Shukla sos in zoology Jiwaji UniversityGwalior （M. P.） 474011 INDIA sos in zoology Jiwaji UniversityGwalior （M. P.） 474011 INDIA

＜正＞ The purpose of this investigation was to explore whether or not propolis extract could prevent the hepatic damage caused by model toxicant i.e. carbon tetrachloride（CCl4）. Antioxidative efficacy of propolis extract was evaluated against acute （1.5 ml/kg, ip. once only） and subchronic （0.15 ml/kg, ip. 21 days） exposure to CCl4. Toxicant exposure provoked marked elevation in the activities of serum transaminases. alkaline phosphatase and lactate dehydrogenase. Significant increased lipid peroxidation was observed after toxicant exposure. Drastic alterations were observed in enzymatic and non - enzymatic antioxidant defense system, which were estimated by reduced and oxidised glutathione. glutathione peroxidaseand glutathione reductase in liver. Initial screening of Propolis extract at different doses （50. 100. 200 and 400 mg/kg. once only, po） revealed recoupment in acute study and found to be very effective in restoring all the parameters. Treatment with effective dose of Propolis extract （200 mg/kg. po） for 5 days after subchronic exposure of toxicant caused significant recovery. It was observed that Propolis exerts its beneficial hepatoprotective effect as a natural antioxidant due to the presence of polyphenols and flavonoids.

关键词： Propolis GSH cycle CCl4

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Applied Mathematics and Mechanics(English Edition) 2010年第9期31卷 1097-1104页

作者： B.HERRERA J.PALLARES Department d'Enginyeria Informàtica i Matematiques Universitat Rovira i VirgiliAvinguda Pasos Catalans 26Tarragona 43007Spain Department d'Enginyeria Mecànica Universitat Rovira i VirgiliAvinguda Pasos Catalans 26Tarragona 43007Spain

In this study, boundary surfaces of a flow field are defined as stream surfaces, on which the shear rates vanish, and a procedure is proposed to find them. The method, based on calculations using the velocity vector f... 详细信息

关键词： interracial surfaces structure of flow kinematics