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ECHOLOCATION CALLS OF Myotis alticraniatus (CHIRROPTERA: VESPERTILIONIDAE) IN VIETNAM 越南高颅肌蝗的回声定位叫声(翅目:大翅蝗科)
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0049
Thong Vu Dinh, Loi Dao Nhan, Thanh Hoang Trung, Nha Pham Van, Nga Cao Thi Thanh, Sengmanichanh Phaly, Ha Nguyen Manh, Toan Vu Duc, Thai Dinh Van, Viet Nguyen Van
Myotis alticraniatus is a small mammal species with widespread distribution in Vietnam and other Asian countries. However, prior to the present study, its echolocation calls were poorly documented. Between 2018 and 2020, we conducted bat surveys in Cat Ba National Park and other areas of Vietnam. Echolocation calls of the species were obtained in different recording situations: handheld, flying inside a fight tent and foraging in natural habitats. The average initial frequency (iFM) and terminal frequency (tFM) of this species’ echolocation calls are in ranges of 113.2-140 kHz and 57.8-68.6 kHz, respectively. Its call duration is in a range of 1.6-3.9 ms. When detecting an object or prey in natural habitats, the species emitted echolocation calls in groups of up to 10 signals with the iFM and tFM values in ranges of 60.6-64.3 kHz and 28.2-31.0 kHz, respectively. Results from the present study exhibited a wide variation in frequencies and signal shapes of the species echolocation calls.
高颅肌是一种小型哺乳动物,广泛分布于越南和其他亚洲国家。然而,在本研究之前,它的回声定位呼叫记录很少。在2018年至2020年期间,我们在猫坝国家公园和越南其他地区进行了蝙蝠调查。该物种的回声定位呼叫是在不同的记录情况下获得的:手持,在战斗帐篷内飞行和在自然栖息地觅食。回声定位叫声的平均起始频率(iFM)和终端频率(tFM)分别在113.2 ~ 140 kHz和57.8 ~ 68.6 kHz之间。其通话时长在1.6-3.9 ms之间。当在自然栖息地探测物体或猎物时,该物种会发出多达10个信号的回声定位呼叫,iFM和tFM值分别在60.6-64.3 kHz和28.2-31.0 kHz之间。本研究的结果显示,回声定位呼叫的频率和信号形状有很大的变化。
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引用次数: 0
SYNTHESIS OF SOME BENZOTHIAZOLE ANILINE DERIVATIVES AND THEIR BIOLOGICAL ACTIVITIES 苯并噻唑类苯胺衍生物的合成及其生物活性
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0042
Hoan Duong Quoc, Dung Nguyen Duc, Luong Truong Minh, Thao Nguyen Thi Thach, Hiền Nguyễn Thị Thu
Three benzothiazole aniline derivatives 2a, 2b, and 2c were synthesized successfully by the reduction reaction of the respective nitro compound in neutral condition with Na2S2O4 in moderate yield. Structures of these derivatives were elucidated by IR, NMR, and MS analysis that referred to a strong agreement between spectral data and structures. Three compounds 2a, 2b, and 2c showed weak antioxidant, antibacterial and antifungal activities.
通过硝基化合物在中性条件下与Na2S2O4的还原反应,以中等产率成功合成了3个苯并噻唑类苯胺衍生物2a、2b和2c。这些衍生物的结构通过红外、核磁共振和质谱分析进行了阐明,光谱数据和结构之间有很强的一致性。化合物2a、2b和2c表现出较弱的抗氧化、抗菌和抗真菌活性。
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引用次数: 0
PRESSURE DEPENDENCES OF LINE PARAMETERS OF THE 𝝂𝟑 + 𝝂𝟒 R(7)F1 TRANSITION OF METHANE DILUTED IN NITROGEN USING THE HARDAND SOFT-COLLISION MODELS 用硬碰撞模型和软碰撞模型研究氮稀释甲烷𝝂<s:1> +𝝂𝟒r (7) f1跃变线参数的压力依赖性
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0041
Tuong Le Cong, Hoa Ngo Ngoc
In this work, the affection of the Dicke narrowing effect on the spectral shape of the 𝜈3 + 𝜈4 R(7)F1 transition of methane diluted in nitrogen was studied using the Hard- and the Soft- collision line-shape models. Room-temperature absorption spectra of CH4 broadened by N2 were measured at a wide range of pressure using a difference-frequency laser spectrometer. Measured spectra of the studied transition were then one-by-one fitted with the simple Voigt profile as well as the two line-shape models considered the Dicke narrowing effect at two different assumptions of velocity-changing collisions: hard- and soft- collisions. The obtained results confirmed that using these two models leads to better qualities of fit with respect to the Voigt profile. Pressure-dependences of the line-shape parameters were also observed for the considered transition. The results showed a good agreement with other studies.
本文采用硬碰撞和软碰撞线形模型,研究了Dicke变窄效应对氮稀释甲烷𝜈3 +𝜈4 R(7)F1跃迁谱形状的影响。用差频激光光谱仪测量了氮气加宽后CH4的室温吸收光谱。在两种不同的速度变化碰撞假设(硬碰撞和软碰撞)下,用简单的Voigt曲线和考虑Dicke窄化效应的两种线形模型逐一拟合所研究跃迁的实测光谱。所得结果证实,使用这两种模型可以获得较好的Voigt剖面拟合质量。对于考虑的过渡,还观察到线形参数的压力依赖性。研究结果与其他研究结果一致。
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引用次数: 0
STUDY FOR FERMION DARK MATTER PRODUCTION IN PHOTON-PHOTON COLLISION 光子-光子碰撞中费米子暗物质产生的研究
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0039
Fermion dark matter (FDM) production is investigated via photonphoton collision and the cross section of the FDM production is calculated in detail. Our results are evaluated at different values of the dark matter scale  and the light FDM mass.
研究了费米子暗物质(FDM)在光子-光子碰撞中的产生,并详细计算了FDM产生的截面。我们的结果在不同的暗物质尺度和光FDM质量值下进行了评估。
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引用次数: 0
PRILIMINARY RESEARCH ON ACTIVITY BUDGET OF INDOCHINESE GREY LANGUR Trachypithecus crepusculus AT HANOI ZOO UNDER HUMAN INFLUENCE
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0050
Vinh Nguyen Thanh, Dung Nguyen Thi Thuy
Two individuals of Indochinese grey langur (Trachypithecus crepusculus) at Hanoi Zoo were studied from August 2014 to January 2015 with a total of 47 observation days and 4290 records to preliminarily determine their activity budget, food composition, and the influence of environmental factors including temperature, humidity, and human impact on their behaviours. The results show that there is a big difference between the activity budget of the two captive individuals and that of freeranging individuals. Furthermore, their food composition was also very different from that of individuals living in the wild and it may be the main reason. From this result, changing the composition of food for Indochinese grey langurs in Hanoi Zoo and limiting the visitors’ food provision needs to be carried out immediately to ensure the health and welfare of these langurs.
结果表明,圈养个体与自由放养个体的活动预算存在较大差异。此外,他们的食物组成也与生活在野外的个体有很大的不同,这可能是主要原因。
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引用次数: 0
STUDY ON THE ANTIBACTERIAL ABILITY OF THE HYBRID MATERIAL BETWEEN PORPHYRIN AND NANO SILVER 卟啉与纳米银杂化材料的抗菌性能研究
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0045
Thao Vu Thi, Quyen Ha Thi, Khanh Phan Tan, Thuy Bui Thi Thu, Loc Nguyen Xuan, C. Nguyen Duc, Nam Nguyen Phuong Hoai, D.B. Berezin
Water-soluble porphyrins di(4-aminophenyl)-di(4-sulfophenyl)- diphenyl-porphyrin [(SO3)2-TPP-(NH2)2](TASP) and nano-silver materials (AgNPs) were successfully synthesized by chemical synthesis and green synthesis from guava leaf extracts, respectively. The silver nanoparticle size is well controlled in the range of 1.1 - 1.5 nm. Then, AgNPsTASP hybrid materials were successfully synthesized by different mixing methods. The UV-Vis spectrum of the hybrid material depends on the AgNPs:TASP mixing ratio and still shows the Soret peaks and Q-bands characteristic of the porphyrin family and the broad absorption range from 300 - 600 nm of the silver nanoparticles initial. The results of an antibacterial test against both gram-negative and gram-positive strains on LB agar showed that all samples had different antibacterial activities. In which, the AgNPsTASP hybrid material has better inactivation ability than silver nano for both tested bacterial strains. Besides, the presence of polypyrrole conducting polymer (PPy) has promoted the kinetics of silver ion release, which also gives outstanding antibacterial results, thereby opening the potential to fabricate hybrid materials for antibacterial applications.
以番石榴叶提取物为原料,分别采用化学合成和绿色合成的方法成功合成了水溶性卟啉二(4-氨基苯基)-二(4-磺胺苯基)-二苯基卟啉[(SO3)2- tpp -(NH2)2](TASP)和纳米银材料(AgNPs)。银的纳米颗粒尺寸控制在1.1 ~ 1.5 nm范围内。然后,通过不同的混合方法成功地合成了AgNPsTASP杂化材料。混合材料的紫外可见光谱取决于AgNPs:TASP的混合比例,仍然显示出卟啉家族的Soret峰和q波段特征,并且银纳米颗粒的初始吸收范围在300 ~ 600 nm。在LB琼脂上对革兰氏阴性菌和革兰氏阳性菌进行抑菌试验,结果表明各样品均具有不同的抑菌活性。其中,AgNPsTASP杂化材料对两种被试菌株的失活能力均优于纳米银。此外,聚吡咯导电聚合物(PPy)的存在促进了银离子的释放动力学,也取得了出色的抗菌效果,从而开辟了制备用于抗菌应用的杂化材料的潜力。
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引用次数: 0
NEW RECORDS ON DISTRIBUTION AND HOSTS OF Brachytarsina cucullata AND Raymondia pseudopagodarum (DIPTERA: STREBLIDAE) IN VIETNAM 文章标题越南短跗跗猴和伪长跗猴分布及寄主新记录(双翅目:链蝇科)
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0048
Luong Nguyen Thanh, Loi Dao Nhan, Nha Pham Van, Viet Nguyen Van, Thinh Ta Huy, Sengmanichanh Phaly, Luong Nguyen Khanh, Nghia Nguyen Xuan, Ha Nguyen Manh, Toan Vu Duc, Thai Dinh Van, Thong Vu Dinh
Bat flies are highly specialized ectoparasites of the superfamily Hippoboscoidea and only associate with bats. They were rarely documented in Vietnam due to limited study in the country. Between 2017 and 2020, we conducted a series of field surveys in six localities in northern and central Vietnam with an emphasis on bat flies. Bats were captured using mist nets, harp traps, and handnets then morphologically identified following literatures relevant to the bats of each study site. Bat flies were collected using fine forceps and preserved in 70% alcohol for morphological identification. Twelve individuals of Brachytarsina cucullata and thirty-five individuals of Raymondia pseudopagodarum of the family Streblidae were collected over the surveys. Of which, B. cucullata is new to two localities in northern Vietnam (Nham Duong Mountain Area and Ha Long Bay) while R. pseudopagodarum is new to five localities in both northern and southern Vietnam (Bach Ma National Park, Cat Ba National Park, Ha Long Bay, Cu Lao Cham Island and Sop Cop Nature Reserve). Within Vietnam, B. cucullata and R. pseudopagodarum were only recorded from Cat Ba National Park and Vu Quang National Park, respectively. Notably, the previous records from Vietnam did not include either description or illustration. We here provide brief descriptions and illustrated photos of each species for morphological identification of these two bat fly species. A map showing the distributional records of each species is also included in this paper.
蝙蝠蝇是一种高度特化的体外寄生虫,属于海马科,只与蝙蝠有联系。由于在越南的研究有限,他们很少被记录在案。在2017年至2020年期间,我们在越南北部和中部的六个地方进行了一系列实地调查,重点是蝙蝠蝇。使用雾网、竖琴陷阱和手网捕获蝙蝠,然后根据与每个研究地点蝙蝠相关的文献进行形态学鉴定。用细钳采集蝙蝠蝇,在70%酒精中保存形态学鉴定。调查共收集到铜管短跗虫12只,链蝇科假跗虫35只。其中,B. cucullata是越南北部两个地区(Nham Duong山区和下龙湾)的新物种,而R. pseudopagodarum是越南北部和南部五个地区(Bach Ma国家公园、Cat Ba国家公园、下龙湾、Cu Lao Cham岛和Sop Cop自然保护区)的新物种。在越南,cucullata和pseudopagodarum分别只在Cat Ba国家公园和Vu Quang国家公园有记录。值得注意的是,以前来自越南的记录既没有描述也没有插图。本文对这两种蝙蝠蝇进行了简要的描述和图解,以供形态学鉴定之用。这篇论文还包括了一幅显示每个物种分布记录的地图。
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引用次数: 0
A NOTE ON S. TAKAHASHI’S ARTICLE 关于高桥先生文章的注释
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0036
We prove that the necessary and sufficient conditions given by S. Takahashi for the Nevanlinna-Pick-Caratheodory-Fejer interpolation problem can be obtained from the theory of D. Sarason.
从Sarason的理论证明了S. Takahashi给出的Nevanlinna-Pick-Caratheodory-Fejer插值问题的充分必要条件。
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引用次数: 0
DETERMINATION OF SOME NUTRITIONAL COMPONENTS AND SENSORY CRITERIA OF IGNAME YAM IN BAC GIANG PROVINCE (Dioscorea esculenta) 江北薯蓣(薯蓣)部分营养成分及感官指标的测定
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0046
Loi Nguyen Van, Tuan Le Anh, Hanh Trang Do Thi
Igname yams are agricultural products with high economic and nutritional value. Igname yam plants are grown a lot in our country, especially in Bac Giang province. The aim of this study was to the determination of nutritional components and sensory of igname yam in Bac Giang province. Research results have identified water content in igname yam is 69.3 ± 0.2%, total lipid content is 4.2 ± 0.1%, total glucide content is 20.5 ± 0.1%, total protein content was 2.6 ± 0.1%, vitamin B1 was 28.5 ± 0.1mg% and vitamin B2 was 12.3 ± 0.1mg%. Besides, the content of minerals, such as Ca, Mg, Mn, P, K, Na, Zn, Cu, S, and Fe, fluctuates in the range of 1.4 to 34mg%. By the HPLC method, 17 amino acids have been identified in igname yam. Among those, there were 9 non-substituting amino acids, including histidine, arginine, threonine, valine, methionine, lysine, isoleucine, leucine, and phenylalanine. The igname yam meat has an ivory white color, a characteristic aroma, a fatty taste, a spongy and friable structure. These are important scientific bases for selecting igname yam for processing food products.
番薯是具有较高经济价值和营养价值的农产品。在我国,特别是在北江省,种植了大量的山药。本研究的目的是测定北江省甘薯的营养成分和感官。研究结果表明,山药中水分含量为69.3±0.2%,总脂肪含量为4.2±0.1%,总葡萄糖含量为20.5±0.1%,总蛋白质含量为2.6±0.1%,维生素B1含量为28.5±0.1mg%,维生素B2含量为12.3±0.1mg%。此外,Ca、Mg、Mn、P、K、Na、Zn、Cu、S、Fe等矿物的含量在1.4 ~ 34mg%之间波动。采用高效液相色谱法,在山药中鉴定出17种氨基酸。其中,非取代氨基酸有组氨酸、精氨酸、苏氨酸、缬氨酸、蛋氨酸、赖氨酸、异亮氨酸、亮氨酸和苯丙氨酸9种。山药肉呈乳白色,香气浓郁,口感油腻,质地绵软易碎。这是选择甘薯加工食品的重要科学依据。
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引用次数: 0
DIVERSITY OF WILD MEDICINAL PLANTS IN THE VEGETABLE CULTIVATION AREAS IN THUONG TIN DISTRICT, HANOI CITY 河内市通田区蔬菜种植区野生药用植物的多样性
Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0047
Linh Nguyen Ha, Lien Nguyen Thi Hong
Evaluation of the diversity of wild medicinal herbs contributes to creating the basis for the effective management, exploitation, and usage of medicinal plant resources in ecosystems. This study has listed 170 species of wild plants belonging to 119 genera, 50 families, 28 orders, and 2 phyla, Pteridophyta, and Magnoliophyta with medicinal value. Whole plants or up to 10 parts of local wild medicinal plants are used in the prevention and treatment of 20 common diseases.
野生药材多样性的评价有助于为生态系统药用植物资源的有效管理、开发和利用奠定基础。本研究共发现具有药用价值的野生植物170种,隶属于蕨类植物、厚朴植物2门,50科28目119属。利用当地野生药用植物的整株或多达10部分,预防和治疗20种常见疾病。
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引用次数: 0
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Journal of Science Natural Science
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