Minute virus of mice (MVM) nucleic acid production in susceptible and resistant strains of mice and F₁ hybrids     

Sanjay Kapil 《Comparative immunology, microbiology and infectious diseases》1995,18(4):245-252

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Dissipation and distribution behavior of azoxystrobin, carbendazim, and difenoconazole in pomegranate fruits     

Utture SC  Banerjee K  Dasgupta S  Patil SH  Jadhav MR  Wagh SS  Kolekar SS  Anuse MA  Adsule PG 《Journal of agricultural and food chemistry》2011,59(14):7866-7873

The dissipation behavior and degradation kinetics of azoxystrobin, carbendazim, and difenoconazole in pomegranate are reported. Twenty fruits/hectare (5 kg) were collected at random, ensuring sample-to-sample relative standard deviation (RSD) within 20-25%. Each fruit was cut into eight equal portions, and two diagonal pieces per fruit were drawn and combined to constitute the laboratory sample, resulting in RSDs <6% (n = 6). Crushed sample (15 g) was extracted with 10 mL of ethyl acetate (+ 10 g Na(2)SO(4)), cleaned by dispersive solid phase extraction on primary secondary amine (25 mg) and C(18) (25 mg), and measured by liquid chromatography tandem mass spectrometry. The limit of quantification was ≤0.0025 μg g(-1) for all the three fungicides, with calibration linearity in the concentration range of 0.001-0.025 μg mL(-1) (r(2) ≥ 0.999). The recoveries of each chemical were 75-110% at 0.0025, 0.005, and 0.010 μg g(-1) with intralaboratory Horwitz ratio <0.32 at 0.0025 μg g(-1). Variable matrix effects were recorded in different fruit parts viz rind, albedo, membrane, and arils, which could be correlated to their biochemical constituents as evidenced from accurate mass measurements on a Q-ToF LC-MS. The residues of carbendazim and difenoconazole were confined within the outer rind of pomegranate; however, azoxystrobin penetrated into the inner fruit parts. The dissipation of azoxystrobin, carbendazim, and difenoconazole followed first + first order kinetics at both standard and double doses, with preharvest intervals being 9, 60, and 26 days at standard dose. At double dose, the preharvest intervals extended to 20.5, 100, and 60 days, respectively.  相似文献   

Effect of Metals on Decolorization of Reactive Blue HERD by <Emphasis Type="Italic">Comamonas</Emphasis> sp. UVS     

Umesh U. Jadhav  Vishal V. Dawkar  Anuradha N. Kagalkar  Sanjay P. Govindwar 《Water, air, and soil pollution》2011,215(1-4):621-629

Comamonas sp. UVS was able to decolorize Reactive Blue HERD (RBHERD) dye (50 mg L^?1) within 6 h under static condition. The maximum dye concentration degraded was 1,200 mg L^?1 within 210 h. A numerical simulation with the model gives an optimal value of 35.71?±?0.696 mg dye g^?1 cell h^?1 for maximum rate (V_max) and 112.35?±?0.34 mg L^?1 for the Michaelis constant (K_m). Comamonas sp. UVS has capability of decolorization of RBHERD in the presence of Mg²⁺, Ca²⁺, Cd²⁺, and Zn²⁺, whereas decolorization was completely inhibited by Cu²⁺. Metal ions also affected the levels of biotransformation enzymes during decolorization of RBHERD. Comamonas sp. UVS was also able to decolorize textile effluent with significant reduction in COD. The biodegradation of RBHERD dye was monitored by UV–vis spectroscopy, FTIR spectroscopy, and HPLC.  相似文献   

Antennal mechanosensors mediate flight control in moths     

Sane SP  Dieudonné A  Willis MA  Daniel TL 《Science (New York, N.Y.)》2007,315(5813):863-866

Flying insects have evolved sophisticated sensory capabilities to achieve rapid course control during aerial maneuvers. Among two-winged insects such as houseflies and their relatives, the hind wings are modified into club-shaped, mechanosensory halteres, which detect Coriolis forces and thereby mediate flight stability during maneuvers. Here, we show that mechanosensory input from the antennae serves a similar role during flight in hawk moths, which are four-winged insects. The antennae of flying moths vibrate and experience Coriolis forces during aerial maneuvers. The antennal vibrations are transduced by individual units of Johnston's organs at the base of their antennae in a frequency range characteristic of the Coriolis input. Reduction of the mechanical input to Johnston's organs by removing the antennal flagellum of these moths severely disrupted their flight stability, but reattachment of the flagellum restored their flight control. The antennae thus play a crucial role in maintaining flight stability of moths.  相似文献   

Role of live microbial feed supplements with reference to anaerobic fungi in ruminant productivity:A review     

Anil K Puniya  Abdelfattah Z M Salem  Sanjay Kumar  Sumit S Dagar  Gareth W Grififth  Monica Puniya  Sreenivas R Ravella  Nikhil Kumar  Tejpal Dhewa  Ravinder Kumar 《中国农业科学(英文版)》2015,(3)

To keep the concept of a safe food supply to the consumers, animal feed industries world over are showing an increasing interest in the direct-fed microbials (DFM) for improved animal performance in te...  相似文献   

Histological and protein changes during early stages of seed germination in the orchid,Dendrobium crumenatum     

Maheswary Vellupillai  Sanjay Swarup  Chong Jin Goh 《The Journal of Horticultural Science and Biotechnology》2013,88(6):941-948

Summary

During germination of seed of the tropical epiphytic orchid, Dendrobium crumenatum, cell division at the chalazal end of the globular embryo occurred after one week of culture on Vacin and Went medium. The larger cells at the middle and basal regions of the embryo continued to enlarge with distinct nuclei and chromatin, indicative possibly of endoduplication. Shoot apex organization at the chalazal end occurred after four weeks of culture. Mobilization of stored reserves was seen as a reduction in the granular nature of the cytoplasm after two weeks in culture. Utilization of protein reserves occurred within 6 d of germination. Subsequently, do novo synthesis and accumulation of cvs proteins increased steadily and reached an equilibrium between 18 and 24 d. Changes in profiles of specific proteins indicated development-specific protein accumulation. Two proteins of Mr 14 and 33 kDa were highly abundant in dry seeds but were degraded within 6 d of germination indicating their possible nutritive role in embryo development. Several other proteins showed steady increases during 24 d from germination.  相似文献   

Effects of pruning intensity on the biochemical status of shoot buds in three mango (Mangifera indica L.) cultivars planted at high density     

Kumar Singh Sanjay  Kumar Singh Sanjay  Roshan Sharma Ram 《The Journal of Horticultural Science and Biotechnology》2013,88(6):483-490

Summary

Mango (Mangifera indica L.) trees grown at high density show a decline in flowering and fruiting after good fruiting years as a result of various factors. Annual pruning can restore production and productivity in such trees. Chlorophyll, total sugars (TS), total phenolics (TP), and proline contents as well as polyphenol oxidase (PPO) activities, were measured in the 2005–2006 and 2006–2007 seasons in shoot buds with a few leaves in three mango cultivars (‘Amrapali’, ‘Mallika’, and ‘Dashehari’). Trees were grown at high density in an orchard and the aforesaid parameters were measured 1 month after different degrees of pruning (Stage I) and after subsequent fruit bud differentiation (FBD; Stage II). Severely-pruned mango trees had the highest contents of chlorophyll a, while chlorophyll b and total chlorophyll contents were found to be highest in moderately-pruned trees. Lightly-pruned trees had the highest contents of reducing sugars (RS), whereas TS contents were highest in severely-pruned trees. The contents of RS and TS increased in shoot buds during the FBD stage. A moderate intensity of pruning significantly increased TP contents, while the lowest TP contents were recorded in non-pruned trees. ‘Off’-year shoots had higher TP contents than ‘on’-year shoots. Irrespective of pruning intensity, shoot buds of ‘Mallika’ trees had the highest PPO activities, with lower levels in ‘Amrapali’ and ‘Dashehari’ shoot buds. PPO activities were reduced at the FBD stage in ‘on’-year shoots. Severely-pruned trees had the highest PPO activities, while the lowest PPO activities were recorded in lightly-pruned trees. Shoot bud proline contents were found to be highest in non-pruned trees, and decreased with increasing pruning intensity. Thus moderate pruning can be adopted in high density orchards to obtain sustainable production with improved maintenance of canopy architecture.  相似文献   

Preface     

Sanjay Kapil 《Veterinary Clinics of North America: Food Animal Practice》2010

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喜玛拉雅嘎瓦耳地区的坡向对温带自然森林的森林成分,群落结构和土壤特性的影响     

C.M. Sharma  N.P. Baduni  Sumeet Gairola  S.K. Ghildiyal  Sarvesh Suyal 《林业研究》2010,21(3):331-337

在喜玛拉雅嘎瓦耳（Garhwal Himalaya）地区,选择7种温带（1500 to 3100 m,a.s.l.）森林类型,研究不同坡面（东北,西北,东南,西南）对自然森林的森林成分、群落结构和土壤特性的影响。在每种森林中自由采样。为了阐明研究不同坡面（东北、西北、东南、西南）对天然森林的森林成分、群落结构和土壤特性的影响,利用标准统计软件计算多种指标,如,重要价值指标、Shannon-Wiener多样性指数、优势辛普森浓度、辛普森多样性指数、种均匀度和物种丰富度指数。在每种森林中采集复合土壤样品,分析土壤的物理化学特性、水分含量、持水量、pH、有机碳、磷、钾和有效氮含量。结果表明,北坡森林的总基盖度（高山栎林Quercus semecarpifolia为74.4 m2&#183;ha-1）、优势度（长叶松林Pinus roxburghii为0.85）和树种多样（石斛蟹Quercus floribunda为1.81）均高于其他坡位森林,北坡森林土壤中的水分含量（白橡树Quercusleucotrichophora为40.8%）、持水量（藏柏Cupressus torulos为48.9%）、有机碳（雪松Cedrus deodara为3.8%）、磷（白橡树Quercus leucotrichophora为31.9 kg&#183;ha-1）和氮（西藏长叶松林Pinus roxburghii为1.0%）均比其他坡位土壤值高。因此,北坡森林的生产力较高。  相似文献   

GIS-based assessment of non-equilibrium pattern between groundwater recharge and irrigation draft in a semi-arid region of Rajasthan,India     

Bidyut K BHADRA  Sanjay KUMAR  Rakesh PALIWAL 《干旱区科学》2016,8(2):184-196

Over-exploitation of groundwater for irrigation can result in drastic reduction in groundwater level in Jodhpur district of western Rajasthan, India. In this study, we used the long-term trend analysis of seasonal groundwater level data to predict the future groundwater scenario in 33 villages of Jodhpur district, assessed the impact of water harvesting structures on groundwater recharge and explored the non-equilibrium between groundwater recharge and irrigation draft in the study area. Analysis of groundwater level data from 26 observation wells in 33 villages in the pre-monsoon period showed that groundwater level decreased continuously at the rate of 2.07 m/a. With this declining rate, most of the tube wells(including the well with the maximum depth of 193 m) are predicted to become completely dry by 2050. Behavior of temporal groundwater level data in the study period(from 2004 to 2012) can be explained by different geospatial maps, prepared using Arc GIS software. Statistical analysis of the interpolated maps showed that the area with the maximum positive groundwater recharge occupied 63.14% of the total area during 2010–2011 and the area with the maximum irrigation draft accounted for 56.21% of the total area during 2011–2012. Higher groundwater recharge is attributed to the increase in rainfall and the better aquifer condition. Spatial distribution for the changes of average groundwater recharge and draft(2008–2009 and 2011–2012) showed that 68.50% recharge area was in positive change and 45.75% draft area was in negative change. It was observed that the area of the irrigation draft exceeded that of the groundwater recharge in most of the years. In spite of the construction of several shallow water harvesting structures in 2009–2010, sandstone aquifer zones showed meager impact on groundwater recharge. The best-fit line for the deviation between average groundwater fluctuation due to recharge and irrigation draft with time can be represented by the polynomial curve. Thus, over-exploitation of groundwater for agricultural crops has result in non-equilibrium between groundwater recharge and irrigation draft.  相似文献