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Monitoring forest gain and loss based on LandTrendr algorithm and Landsat images in KTH Pati social forestry area, Indonesia 基于LandTrendr算法和Landsat图像的印尼KTH Pati社会林区森林损益监测
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4781
Deha Agus Umarhadi, Wahyu Wardhana, None Senawi, Emma Soraya
Social forestry schemes are now being implemented in numerous state forest areas in Indonesia, aiming to reduce deforestation and improve the community’s livelihood. However, spatial monitoring in the social forestry area is still limited to see how the implementation progresses. The present study aimed to identify the change of forest taking a case in Pati Forest Farmer Communities (KTH Pati) social forestry area from 1996 to 2022 using the LandTrendr algorithm based on Normalized Burn Ratio (NBR) value of Landsat image series. The results detected forest loss and gain covering an area of 453.97 ha and 494.18 ha, respectively. Two main reasons causing the forest loss are the country’s financial and political situation from 1997 to 2003 and the harvest of forest plantations in 2017–2018. However, it was found that the study area had a positive forest gain with the current continuous growth of 292.32 ha (20.16% of the total area). Even though the social forestry policy has not significantly shown a positive impact on forest growth, spatial monitoring through remote sensing can be a great tool for observing the progress.
社会林业计划目前正在印度尼西亚的许多国有林区实施,旨在减少森林砍伐和改善社区生计。然而,在社会林业领域的空间监测仍然是有限的,看如何实施进展。采用基于归一化燃烧比(NBR)值的LandTrendr算法,以1996 - 2022年Pati林农社区(KTH Pati)社会林区为例,对森林变化进行了研究。结果显示,森林损失面积为453.97 ha,森林增收面积为494.18 ha。造成森林损失的两个主要原因是1997年至2003年国家的财政和政治局势以及2017年至2018年森林人工林的收获。结果表明,研究区目前的森林增收为292.32 ha(占总面积的20.16%),为正增长。尽管社会林业政策并未对森林生长产生显著的积极影响,但通过遥感进行的空间监测可以成为观察进展的重要工具。
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引用次数: 0
Sowing carbon solutions: Decoding soil characteristics and carbon fluxes in maize-dominated cropping systems of Tamil Nadu, India 播种碳解决方案:解码印度泰米尔纳德邦以玉米为主的种植系统的土壤特征和碳通量
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4760
Libi Robin, P, Kaleeswari, R.K., Janaki, P, Uma. D, Karthikeyan, S
This study on soil carbon dynamics provides valuable insights for sustainable agricultural practices, optimizing crop productivity and environmental sustainability in maize-based cropping systems. The present study aimed to find out the soil characteristics and carbon dynamics in maize-based cropping systems in the Western zone of Tamil Nadu, India. Soil samples from six cropping systems were analyzed for bulk density, sand, silt, clay content, pH, available nutrients (N, P, K, Zn), total organic carbon (TOC), oxidizable organic carbon fractions, microbial biomass carbon (MBC), and carbon pools. The distribution of oxidizable organic carbon fractions varied among cropping systems and soil depths. The easily decomposable and moderately labile fractions were highest in the maize-black gram system, while the recalcitrant fraction showed variations across cropping systems. The active carbon pool (Cf1 + Cf2) was highest at 2.53 g kg-1 in the maize-blackgram system, while the passive carbon pool (Cf3 + Cf4) was also highest at 3.79 g kg-1 in this system. The study also assessed the carbon stock and microbial biomass carbon. TOC content decreased with depth, with the highest values observed in the topsoil. The maize-black gram system had the highest TOC content at all depths. MBC content followed a similar pattern, with the highest values in the topsoil and the maize-black gram system. These findings provided insights into the soil characteristics and carbon dynamics in maize-based cropping systems in the study area. The long-term integration of maize cultivation with blackgram demonstrated significant enhancements in organic carbon levels, TOC content, microbial biomass carbon (MBC), and both passive and active carbon pools characterized by rapid turnover rates.
这项土壤碳动态研究为可持续农业实践、优化玉米种植系统的作物生产力和环境可持续性提供了有价值的见解。本研究旨在了解印度泰米尔纳德邦西部地区玉米种植系统的土壤特征和碳动态。分析了6种种植制度下土壤样品的容重、砂质、粉质、粘土含量、pH、速效养分(N、P、K、Zn)、总有机碳(TOC)、可氧化有机碳组分、微生物生物量碳(MBC)和碳库。可氧化有机碳组分的分布在不同的种植制度和土壤深度之间存在差异。易分解组分和中等不稳定组分在玉米-黑克体系中最高,而难分解组分在不同的种植体系中存在差异。活性碳库(Cf1 + Cf2)最高,为2.53 g kg-1;被动碳库(Cf3 + Cf4)最高,为3.79 g kg-1。研究还评估了碳储量和微生物生物量碳。TOC含量随深度降低,表层土壤中TOC含量最高。玉米-黑克体系各深度TOC含量最高。MBC含量变化规律相似,在表层土壤和玉米-黑克体系中含量最高。这些发现为研究区以玉米为基础的种植系统的土壤特征和碳动态提供了见解。玉米与黑土长期结合,有机碳含量、TOC含量、微生物生物量碳(MBC)以及以快速周转率为特征的被动碳库和活性碳库均显著提高。
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引用次数: 0
Method validation and monitoring of emamectin benzoate in mature banana fruit with peel and pulp through Liquid chromatography-Mass spectrometry/ Mass spectrometry (LC-MS/MS) 液相色谱-质谱联用/质谱联用(LC-MS/MS)方法验证及监测成熟香蕉果皮和果肉中苯甲酸埃维菌素
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4828
R. Surya Raj, S.V. Krishnamoorthy, A. Suganthi, C. Kavitha, S. Karthikeyan, Ashok Kumar Karedla, P. Karthik, J. Kousika
Emamectin benzoate has been frequently used in the banana ecosystem to combat the damage of pseudostem weevil. Therefore, the present study was conducted to validate the method, to assess harvest time residues and monitor emamectin benzoate residues in mature banana peel and pulp samples through LC-MS/MS. The validated method was used to determine emamectin benzoate residue in market banana samples. The study used Waters Alliance LC and Acquity TQD with an electrospray ionization interface in the positive ion mode. An isocratic flow of 0.1% formic acid (HCOOH) in water and 0.1% HCOOH in acetonitrile (CH3CN) was utilised for separation. CH3CN was utilised to extract emamectin benzoate residue from the samples, and a dispersive solid-phase extraction technique was used for subsequent cleanup. Linearity tests were performed with standard solutions containing 0.01 to 0.1 g mL-1, with three replicates for each concentration. For mature banana peel & pulp and mature banana pulp matrices, satisfactory recoveries of 79.85 to 95.09% and 89.20 to 100.94%, respectively and high precision relative standard deviations of 0.56 to 2.34% and 2.33 to 6.88%, respectively were obtained. For mature banana (peel and pulp, pulp alone) fruits, the lower detection and quantification limits were (0.003, 0.008), and (0.002, 0.007). The validated approach was utilised to analyse mature banana fruit samples obtained from emamectin benzoate treated fields and banana samples purchased from the local market. Results showed satisfactory validation of parameters like linearity, the limit of detection and quantification, and recovery for determining emamectin benzoate residues in banana fruit.
在香蕉生态系统中,为了防治假茎象鼻虫的危害,经常使用苯甲酸埃维菌素。因此,本研究对该方法进行了验证,并通过LC-MS/MS对成熟香蕉皮和果肉样品中的收获时间残留进行了评估和苯甲酸埃维菌素残留量的监测。将该方法应用于市售香蕉样品中苯甲酸埃维菌素残留量的测定。该研究使用Waters Alliance LC和Acquity TQD,并在正离子模式下使用电喷雾电离界面。采用0.1%甲酸(HCOOH)水溶液和0.1%甲酸(HCOOH)乙腈(CH3CN)等温流动进行分离。用CH3CN提取样品中的埃维菌素苯甲酸酯残留物,用分散固相萃取技术进行后续清理。在0.01 ~ 0.1 g mL-1的标准溶液中进行线性试验,每个浓度重复3次。成熟的香蕉皮;香蕉果肉和成熟香蕉果肉基质的加样回收率分别为79.85 ~ 95.09%和89.20 ~ 100.94%,精密度相对标准偏差分别为0.56 ~ 2.34%和2.33 ~ 6.88%。成熟香蕉果实(果皮加果肉,单果肉)的检测定量下限分别为(0.003,0.008)和(0.002,0.007)。利用该验证方法分析了从苯甲酸埃马菌素处理过的田地获得的成熟香蕉果实样本和从当地市场购买的香蕉样本。结果表明,测定香蕉果实中苯甲酸埃维菌素残留量的线性度、检测限、定量限、回收率等参数验证满意。
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引用次数: 0
Salt stress and its impact on rice physiology with special reference to India- A review 盐胁迫及其对水稻生理的影响,特别以印度为例
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4747
Abinaya Sezhiyan, Ashok Subiramaniyan, Chandrasekaran Perumal, None Ashokkumar Natarajan, Rajeshkumar Arumugam, Kuttimani Ramalingam, Navin Kumar Chinnaraju
With the increasing population, by 2030, the population of India will have seen an unprecedented rise of 1.43 billion and require food grains of around 311 million tones. Of the total area, nearly 5% of the area in India is affected by soil salinity. It is said that about 10% of soil is salinized every year. At this rate, 50% of the land area will be salinized by 2050.These repercussions challenge us to expand the area under cultivation or to increase the yield per unit area to maintain food security and sustainability. In order to meet the growing demands of the increased population, two major approaches can be met. Firstly, the available area under cultivation must be increased, which can be done by the reclamation of various problematic soils and making them suitable for cultivation. The second and holistic approach is to employ various biotechnological and breeding aspects in the development of resistant varieties surviving the harsh and unfavourable environment and showing no subsequent reduction in the yield parameters. For this, one must understand the various physiological aspects of tolerance for screening the elite varieties suited for a particular ecosystem or environment. Thus, the present study vividly explains the various physiological aspects of salt stress on rice. Employing these techniques, one can screen superior genotypes resistant to various stresses, thus keeping the Malthus predictions at bay.
随着人口的不断增长,到2030年,印度人口将达到前所未有的14.3亿,需要约3.11亿吨粮食。在总面积中,印度近5%的面积受到土壤盐分的影响。据说每年大约有10%的土壤盐碱化。按照这个速度,到2050年,50%的土地面积将盐碱化。这些影响促使我们扩大种植面积或提高单位面积产量,以维持粮食安全和可持续性。为了满足不断增长的人口日益增长的需求,可以采取两种主要方法。首先,必须增加可耕种的面积,这可以通过开垦各种有问题的土壤,使其适合耕种来实现。第二种全面的方法是利用各种生物技术和育种方面的方法来开发抗性品种,使其在恶劣和不利的环境中存活下来,并且在产量参数上没有后续的下降。为此,人们必须了解耐受性的各种生理方面,以便筛选适合特定生态系统或环境的优良品种。因此,本研究生动地解释了盐胁迫对水稻生理的各个方面。利用这些技术,人们可以筛选出对各种压力具有抵抗力的优良基因型,从而使马尔萨斯的预测成为可能。
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引用次数: 0
Inhibition of Mycobacterium tuberculosis MtrA response regulator by anticancer drugs via computational methods 抗癌药物抑制结核分枝杆菌MtrA反应调节因子的计算方法
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4631
Akash Tripathi Satsangi, Pardeep Yadav, Arun Prasad Chopra, Saurabh Kumar Jha
Mycobacterium tuberculosis (MTB) causes TB disease and millions of deaths are reported every year. Drug resistance TB and its complex treatment is a big problem worldwide. The present study aimed to design new and safer antitubercular compounds to tackle this serious threat. The unique drug target is the MtrAB Two-component regulatory system (2CRS) of mycobacteria. MtrAB system consists of MtrB sensor kinase (SK) and MtrA response regulator (RR). This system is essential in MTB and is involved in mycobacteria's proliferation. This important physiological process is operated by the phosphorylation of MtrB and then to MtrA. The phosphorylation mechanism triggers modulation in the expression of MtrA targets genes and helps perform appropriate function. This phenomenon depends on the active and inactive confirmation of MtrA, which involves a ligand (Metal ion complex e.g. Mg2+). In this study, anti-cancerous compounds were selected for the inhibition of MtrA. However, molecular docking exhibited binding affinity ranging from −10.8 to −4.7 kcal/mol, targeting the binding pocket of the selected Tuberculosis–MtrA protein (PDB ID: 5L8X). This energy difference between the native ligand and docked compounds showed that the six molecules: (Risperidone, 2-(benzofuran-2-yl)-6,7-dimethyl-4H-chromen-4-one, (2E)-1-(4-hydroxyphenyl)-3-(quinolin-4-yl)prop-2-en-1-one, Estradiol Cypionate, (2Z)-6-hydroxy-2-(3,4,5-trimethoxybenzylidene)-1-benzofuran-3(2H)-one, (2E)-3-(2,3-dihydro-1,4-benzodioxin-6-yl)-1-(3-hydroxyphenyl)prop-2-en-1-one) mentioned are more potent than the native ligand.These six molecules were first time reported as the inhibitor for MtrA of MtrAB Two-component regulatory system and can be utelize for further study.
结核分枝杆菌(MTB)引起结核病,每年有数百万人死亡。结核病的耐药及其复杂的治疗是一个世界性的大问题。本研究旨在设计新的和更安全的抗结核化合物来解决这一严重威胁。独特的药物靶点是分枝杆菌的MtrAB双组分调控系统(2CRS)。MtrAB系统由MtrB感应激酶(SK)和MtrA反应调节因子(RR)组成。该系统在结核分枝杆菌中是必不可少的,并参与分枝杆菌的增殖。这个重要的生理过程是由MtrB的磷酸化,然后再到MtrA。磷酸化机制触发MtrA靶基因表达的调节,并帮助发挥适当的功能。这种现象取决于MtrA的活性和非活性确认,其中涉及配体(金属离子配合物,例如Mg2+)。在这项研究中,选择了抗癌化合物来抑制MtrA。然而,分子对接显示出−10.8至−4.7 kcal/mol的结合亲和力,靶向选定的结核菌- mtra蛋白(PDB ID: 5L8X)的结合袋。天然配体与对接化合物的能量差表明,利培酮、2-(苯并呋喃-2-基)-6,7-二甲基- 4h - chromen4 -one、(2E)-1-(4-羟基苯基)-3-(喹啉-4-基)- 2-en-1、雌二醇- Cypionate、(2Z)-6-羟基-2-(3,4,5-三甲氧基苄基)-1-苯并呋喃-3(2H)-one、(2E)-3-(2,3-二氢-1,4-苯并二辛-6-基)-1-(3-羟基苯基)- 2-en-1比天然配体更有效。这6个分子首次被报道为MtrAB双组分调控系统中MtrA的抑制剂,可以用于进一步的研究。
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引用次数: 0
Growth analysis and parametric budgeting of different exogenous phytohormones on direct sown finger millet (Eleusine coracana L.) under irrigated conditions 灌水条件下直播小谷子不同外源激素的生长分析及参数调控
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4868
P. Srinithi, R. Mohanapriya, A. Gnana Vinoba, K. Vijay Aravinth
Finger millet (Eleusine coracana L.) is an important cereal crop known for its nutritional value and adaptability to diverse environmental conditions. In recent years, there has been growing interest in exploring the potential of plant growth regulators (PGR) to enhance crop productivity and quality. The present investigation aimed to evaluate the effect of plant growth regulators on direct sown finger millet variety Co (Ra) 14 in 2022-23. The experiment was laid out in randomized complete block design consisting of ten treatments viz., T1 (100% RDF - Control), T2 (100% RDF + Foliar spraying of Brassinosteroid @ 0.5 ppm), T3 (100% RDF + Foliar spraying of Gibberellic acid @10 ppm), T4 (100% RDF + Foliar spraying of Salicylic acid @100 ppm), T5 (50% RDF + Foliar spraying of Brassinosteroid @ 0.5 ppm), T6 (50% RDF + Foliar spraying of Gibberellic acid @10 ppm), T7 (50% RDF + Foliar spraying of Salicylic acid @100 ppm), T8 (Foliar spraying of Brassinosteroid @ 0.5 ppm), T9 (Foliar spraying of Gibberellic acid @10 ppm), T10 (Foliar spraying of Salicylic acid @100 ppm). The experiment result showed that the application of 100% RDF + Foliar spraying of Brassinosteroid @ 0.5 ppm (T2) significantly enhanced growth and physiological parameters like plant height (134.1 cm), SPAD value (28.61), soluble protein (11.25%), relative water content (50.2%) and lower proline content (0.15 µ moles g-1). The same treatment combination recorded higher grain yield (4791 Kg ha-1), straw yield (5950 Kg ha-1), per day productivity (44.6 Kg ha-1) and partial productivity (82.9 Kg ha-1) and BEP (126.88%)of finger millet.
谷子(Eleusine coracana L.)是一种重要的谷类作物,以其营养价值和对多种环境条件的适应性而闻名。近年来,人们对植物生长调节剂(PGR)在提高作物产量和品质方面的潜力越来越感兴趣。本试验旨在评价植物生长调节剂对2022-23年直播小谷子品种Co (Ra) 14的影响。实验是在随机完全区组设计组成的十治疗即。,T1 (100% RDF -控制),T2 (100% RDF +叶面喷洒Brassinosteroid @ 0.5 ppm), T3 (100% RDF +叶面喷洒的赤霉酸@10 ppm), T4(100%水杨酸的RDF +叶面喷洒@100 ppm), T5 (50% RDF +叶面喷洒Brassinosteroid @ 0.5 ppm), T6 (50% RDF +叶面喷洒的赤霉酸@10 ppm), T7(50%水杨酸的RDF +叶面喷洒@100 ppm),T8(叶面喷施油菜素内酯0.5 ppm), T9(叶面喷施赤霉素10 ppm), T10(叶面喷施水杨酸100 ppm)。试验结果表明,施用100% RDF +叶面喷施0.5 ppm (T2)油菜素内酯显著提高了油菜的生长和生理参数,如株高(134.1 cm)、SPAD值(28.61)、可溶性蛋白(11.25%)、相对含水量(50.2%)和脯氨酸含量(0.15µmol g-1)。相同处理组合的谷子籽粒产量(4791 Kg ha-1)、秸秆产量(5950 Kg ha-1)、日产量(44.6 Kg ha-1)、部分产量(82.9 Kg ha-1)和高效能(126.88%)较高。
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引用次数: 0
Comparing the influence of natural farming on cotton (Gossypium hirsutum) yield and economics with integrated and organic farming 比较自然耕作与综合有机耕作对棉花产量和经济效益的影响
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4882
Monicaa M, R. Krishnan, R. Sunitha, S. Sanbagavalli, S. Manickam, A. Senthil, S. P. Sangeetha
Cotton, a vital global cash crop, influences the economy and sustainability. Natural farming is a cost-effective, eco-friendly method. This study examines Natural Farming's effects on cotton yield and the economics of cotton compared to Integrated and organic farming. Field experiments were conducted during 2021-22 and 2022-23 at Tamil Nadu Agricultural College, Coimbatore. The experiment consisted of eight treatments, laid out in Randomized Block Design and replicated thrice. The treatments consist of control (T1), various Indian Natural farming practices including Beejamirit as a seed treatment, Ghanajeevamirit as basal, Jeevamirit with irrigation water, crop residue mulch, intercroping with pulses (T2 to T5), Organic farming practices (T6), Integrated crop management (ICM) practices with organic pest control (T7) and ICM with chemical pest (T8). The results indicated a significant increase in yield components: sympodial branches plant-1 (12.85 and 13.40), number of squares (29.28 and 31.28), bolls plant-1 (10.74 and 11.32), and boll weight (4.30 and 4.38 g) under Integrated Crop Management practices in 2021-22 and 2022-23, respectively. However, organic farming practices, followed by natural farming practices, were at par with integrated crop management. Integrated crop management practices resulted in significantly higher seed cotton yields (2178 and 2232 kg/ha in 2021-22 and 2022-23, respectively) than organic and natural farming practices with a higher cost of cultivation and a gross return. Complete natural farming outperformed organic and integrated farming in cotton, yielding higher net returns and B: C ratios. This approach holds promise for enhancing yield, economic viability and environmental sustainability in cotton cultivation.
棉花是一种重要的全球经济作物,影响着经济和可持续性。自然农业是一种经济、环保的方法。本研究考察了与综合农业和有机农业相比,自然农业对棉花产量和棉花经济的影响。田间试验于2021-22年和2022-23年在哥印拜陀泰米尔纳德邦农业学院进行。试验包括8个处理,采用随机区组设计,重复3次。这些处理包括控制(T1)、各种印度自然农业实践,包括bejamirit作为种子处理、Ghanajeevamirit作为基础处理、Jeevamirit与灌溉、作物残茬覆盖、豆类间作(T2至T5)、有机农业实践(T6)、作物综合管理(ICM)实践与有机害虫控制(T7)和ICM与化学害虫(T8)。结果表明,2021-22年和2022-23年,作物综合管理措施显著提高了水稻的产量组成成分:合集枝1号(12.85和13.40)、方数(29.28和31.28)、铃数1号(10.74和11.32)和铃重(4.30和4.38 g)。然而,有机农业实践,然后是自然农业实践,与综合作物管理是一样的。与种植成本和总回报较高的有机和自然耕作方式相比,作物综合管理方式的籽棉产量显著提高(2021-22年和2022-23年分别为2178公斤/公顷和2232公斤/公顷)。在棉花方面,完全自然耕作优于有机耕作和综合耕作,产生更高的净回报和B: C比率。这种方法有望提高棉花种植的产量、经济可行性和环境可持续性。
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引用次数: 0
Acinetobacter baumannii producing ESBLs and carbapenemases in the Intensive Care Units developing fosfomycin and colistin resistance 在重症监护病房产生ESBLs和碳青霉烯酶的鲍曼不动杆菌产生磷霉素和粘菌素耐药性
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4872
Sura A. Abdulateef, Mustafa S. Al-Salmani, Hasan A. Aal Owaif
Acinetobacter baumannii is responsible for causing difficult-to-treat healthcare-associated infections globally, owing to its resistance to antibiotics. The intensive care unit (ICU) settings mediate spread of multidrug resistance (MDR) strains. This research aimed to evaluate non-susceptible colistin and fosfomycin A. baumannii, harboring extended-spectrum beta-lactamases (ESBLs) and carbapenemases in ICU setting. During the period of 2019-2021, this study obtained 200 A. baumanni isolates out of 1410 burns samples from an ICU setting. The antibiotic sensitivity, ESBLs and carbapenemase production were determined using clinical and laboratory standards institute (CLSI) 2020. The colistin (mcr-1 and mcr-2) and fosfomycin (fosA3) resistance genes was amplified. The highest resistance was to ceftazidime (98%), cefepime (86%), tetracycline (84%), levofloxacin (78%) and piperacillin-tazobactam (76%), while the highest sensitivity was to meropenem (63%) and tigecycline (62%). ESBL production was determined in 94% and carbapenemases were observed in 54% of A. baumannii. Four isolates (2%) were found to carry the mcr-1 gene, and three isolates (1.5%) were found to carry the mcr-2 gene. Moreover, the fosA3 was not detected in the isolates. This study showed that MDR A. baumannii was high in ICU settings. The spread of antibiotics considered the last line of defense against infections is a concern that necessitates surveillance and control measures.
鲍曼不动杆菌由于对抗生素具有耐药性,在全球范围内造成难以治疗的卫生保健相关感染。重症监护病房(ICU)环境介导多药耐药(MDR)菌株的传播。本研究旨在评估ICU环境中含有广谱β -内酰胺酶(ESBLs)和碳青霉烯酶的非敏感粘菌素和鲍曼磷霉素A.。在2019-2021年期间,本研究从ICU的1410份烧伤样本中获得了200株鲍曼不动杆菌。采用临床和实验室标准协会(CLSI) 2020检测抗生素敏感性、ESBLs和碳青霉烯酶产量。扩增出黏菌素(mcr-1和mcr-2)和磷霉素(fosA3)耐药基因。耐药最高的是头孢他啶(98%)、头孢吡肟(86%)、四环素(84%)、左氧氟沙星(78%)和哌拉西林-他唑巴坦(76%),敏感性最高的是美罗培南(63%)和替加环素(62%)。94%的鲍曼不动杆菌产生ESBL, 54%的鲍曼不动杆菌产生碳青霉烯酶。4株(2%)携带mcr-1基因,3株(1.5%)携带mcr-2基因。此外,在分离株中未检测到fosA3。这项研究表明,耐多药鲍曼杆菌在ICU环境中很高。抗生素被认为是抵御感染的最后一道防线,抗生素的传播令人担忧,需要采取监测和控制措施。
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引用次数: 0
Influence of distinctive Osmoprotectnats foliar spray in alleviating the harmful effects of water stress at sensitive growth stages of Maize (Zea mays L.) 不同渗透保护剂叶面喷施对玉米敏感生育期水分胁迫影响的影响
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4855
Bobbe Sivakumar, M. Mohamed Yassin, S. Marimuthu, M.K. Kalarani, S. Thiyageshwari
Water availability is becoming a significant concern for crop production worldwide. In light of this, a study was conducted in maize crop to explore the effectiveness of various osmoprotectants including sodium nitroprusside nanoparticles (SNP NP) at a concentration of 90 ppm, melatonin (MEL), at 25 ppm and salicylic acid (SA) at 100 ppm in mitigating the adverse effects of drought, by evaluating their impact on morpho-physiological, biochemical and yield attributes of maize (Zea mays L.). Drought stress was induced by withholding irrigation during both the vegetative and reproductive stages of maize and then drought-stressed plants were foliar sprayed with different osmoprotectants. Results revealed that among the osmoprotectants tested, foliar application of salicylic acid at 100 ppm exhibited the most substantial improvement in morpho-physiological parameters (plant height, stem diameter, leaf number, root length, leaf area index, relative water content, leaf chlorophyll and carotenoid content) as well as biochemical parameteters like proline and soluble protein content increased, and enhanced membrane stability under drought conditions. The use of SA proved outstanding as it led to a remarkable 75% higher biological yield than plants subjected to drought stress. On the other hand, the SA foliar spray was successful, resulting in a 78.8% in grain yield. However, the extent of improvement varied depending on the growth stage at which the osmoprotectants were applied. While the foliar application of osmoprotectants showed promising results during the vegetative phase than the reproductive phase of maize. Nonetheless, the osmoprotectants' foliar spray exhibited a yield advantage by preserving photosynthetic pigments and the maize plants' ability to produce seeds under drought stress.
水资源供应正成为全球作物生产的一个重大问题。为此,本研究通过评价硝普钠纳米颗粒(SNP NP)浓度为90 ppm、褪黑素(MEL)浓度为25 ppm和水杨酸(SA)浓度为100 ppm对玉米(Zea mays L.)形态生理生化和产量属性的影响,探讨了不同渗透保护剂对干旱不利影响的缓解效果。在玉米营养期和生殖期分别通过不灌水诱导干旱胁迫,然后对干旱胁迫植株叶面喷施不同的渗透保护剂。结果表明,在不同渗透保护剂中,100 ppm水杨酸对水稻形态生理参数(株高、茎粗、叶数、根长、叶面积指数、相对含水量、叶片叶绿素和类胡萝卜素含量)的改善最为显著,对脯氨酸和可溶性蛋白含量等生化参数的改善最为显著,干旱条件下膜稳定性增强。结果表明,与干旱胁迫下的植物相比,SA的生物产量提高了75%。叶面喷施效果较好,籽粒产量提高78.8%。然而,改善的程度取决于渗透保护剂应用的生长阶段。而渗透保护剂在玉米营养期的叶面施用效果优于生殖期。尽管如此,渗透保护剂的叶面喷雾通过保存光合色素和玉米植株在干旱胁迫下产生种子的能力显示出产量优势。
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引用次数: 0
Experimental investigation of anti-corrosive behaviour of Beta vulgaris: A green approach 甜菜防腐性能的实验研究:绿色途径
Q4 Immunology and Microbiology Pub Date : 2023-09-19 DOI: 10.31018/jans.v15i3.4969
Shramila Yadav, Shikha Kaushik, Neelu Dheer, Sarita Kumar, Gurmeet SIngh, Mansi Chaudhary, Meenakshi Gupta
The loss of metals due to corrosion can be prevented using green inhibitors. Using natural and eco-friendly plant products is futuristic, preventing the environment from toxic and harmful chemicals. The present study aimed to investigate whole beetroot (BR, Beta vulgaris) for its anti-corrosion behaviour by galvanostatic polarization and electrochemical impedance techniques at a temperature between 298 K- 328 K. The temperature study would help in proposing BR's adsorption mechanism on metal surfaces. The maximum inhibition efficiency of 94% at 298 K for 5% BR was observed, whereas a minimum of 75% was obtained for 1% BR at 328 K. It was found to be a mixed-type inhibitor that followed Langmuir isotherm. From thermodynamic studies, ΔGoads was found to be -13.64 kJ/mol, which revealed that BR adsorbed physically on the surface of mild steel. Rct values increased while Cdl values decreased on exposure of metal surface with BR extract. The scanning electron micrographs (SEM) and atomic force micrographs (AFM) witnessed the formation of a protective layer on the mild steel surface, which served as a barrier between the metal and corrosive medium. The present study provides a remedy for the financial and structural losses due to metal corrosion in an acidic medium.
由于腐蚀造成的金属损失可以用绿色缓蚀剂来防止。使用天然和环保的植物产品是未来的,防止环境受到有毒和有害化学物质的影响。采用恒流极化和电化学阻抗技术,研究了甜菜根(BR, Beta vulgaris)在298 ~ 328 K温度下的防腐性能。温度研究有助于揭示BR在金属表面的吸附机理。在298 K下,5% BR的抑制率最高可达94%,而在328 K下,1% BR的抑制率最低可达75%。发现它是一种遵循Langmuir等温线的混合型抑制剂。热力学研究发现ΔGoads为-13.64 kJ/mol,表明BR在低碳钢表面有物理吸附。BR提取物暴露于金属表面后,Rct值升高,Cdl值降低。扫描电子显微镜(SEM)和原子力显微镜(AFM)观察到在低碳钢表面形成一层保护层,该保护层在金属和腐蚀介质之间起到屏障作用。本研究为金属在酸性介质中腐蚀所造成的经济和结构损失提供了一种补救方法。
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引用次数: 0
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