A
bstract
Moduli stabilisation in string compactifications with many light scalars remains a major blind-spot in the string landscape. In these regimes, analytic methods cease to work for generic ...choices of UV parameters which is why numerical techniques have to be exploited. In this paper, we implement algorithms based on JAX, heavily utilising automatic differentiation, just-in-time compilation and parallelisation features, to efficiently construct string vacua. This implementation provides a golden opportunity to efficiently analyse large unexplored regions of the string landscape. As a first example, we apply our techniques to the search of Type IIB flux vacua in Calabi-Yau orientifold compactifications. We argue that our methods only scale mildly with the Hodge numbers making exhaustive studies of low energy effective field theories with
O
(100) scalar fields feasible. Using small computing resources, we are able to construct
O
(10
6
) flux vacua per geometry with
h
1
,
2
≥ 2, vastly out-performing previous systematic searches. In particular, we showcase the efficiency of our methods by presenting generic vacua with fluxes below the tadpole constraint set by the orientifold with up to
h
1
,
2
= 25 complex structure moduli.
Summary
A case of Pierre Robin syndrome with osteoarthropathy affecting the superior and the inferior extremity and the spinal column is being presented.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
Alzheimer's disease (AD) has been closely linked to type 2 diabetes mellitus (T2DM) and insulin resistance plays a key role in the onset and development of AD. It has also been reported that NO ...donors play an important role in diabetes and have neuroprotective activity. The present study evaluated the effects NOS substrate, L-arginine and NOS-blocker, NG-nitro-L-arginine methyl ester (L-NAME) on cognitive functions, brain amyloid β levels and other associated biochemical markers in diabetes (T2DM)-induced AD in rats. T2DM was induced by a combination of high fat diet (HFD) and streptozotocin (STZ) (35 mg/kg, i.p.). Pretreatment with L-arginine (100 mg/kg/day) improved diabetes related biochemical parameters viz. plasma glucose, triglycerides and cholesterol. In addition, L-arginine also improved insulin levels and glucose tolerance. On the other hand, NO synthase inhibitor, L-NAME (10 mg/kg), did not have much influence on these parameters. Further, L-arginine treatment showed ameliorative effects on cognitive deficits seen in the Morris water maze (MWM) test when compared to the vehicle (saline) treated group and similar results were observed in the passive avoidance test. These neurobehavioural changes were associated with predictable modulations in Aβ levels in hippocampus and cortex in HFD + STZ + saline group, which were attenuated in the L-arginine, but not in the L-NAME-treated group. Our results indicate that L-arginine could be a considered a potential therapeutic strategy to attenuate the diabetes induced cognitive deficits in AD.
•We tested eight citrus rootstock genotypes for maximizing the production of quality fruits of lemon cv. Kagzi Kalan.•Rough lemon and RLC-4 (strain of Citrus jambhiri) rootstocks promoted scion ...vigour, fruit juice content, and accumulation of foliar N and K content.•Troyer citrange rootstock inhibited vigour of scion cultivar and foliar Na content of scion but performed poorly in terms of fruiting density and nutrients accumulation.•Sour orange exhibited the highest accumulation of Cu and Zn in leaf tissues, while Karna Khatta, rough lemon and RLC-4 absorbed more foliar Fe content than other rootstocks tested.
The present study aimed to evaluate the horticultural performance of lemon cv ‘Kagzi Kalan’ on eight rootstocks under typical subtropical conditions for maximizing the production and fruit quality. The experiment was conducted on five years old Kagzi Kalan lemon plants budded on eight rootstocks. The variables collected over two successive years included vegetative growth, fruiting density, fruit quality, and leaf nutrient concentrations. Results revealed a significant effect of rootstocks on all the variables studied. Tree height and canopy volume were found higher on rough lemon and RLC-4 rootstocks, while trunk cross sectional area was higher on Billikichlli and RLC-4 rootstocks than other rootstocks. RLC-4 and Attani-2 rootstocks had higher fruiting density, while it was lowest on Troyer citrange. RLC-4 produced heaviest fruits, while trees on rough lemon and RLC-4 had significantly higher juice recovery. RLC-4 and Karna Khatta improved TSS and acid contents in the fruit juice. RLC-4 and Troyer citrange proved their superiority in terms of higher ascorbic acid content. Foliar N concentration in scion cultivars was found higher on RLC-4, rough lemon and Attani-2 rootstocks, while the foliar K content was higher on RLC-4 and rough lemon. Jatti Khatti was more efficient in accumulating Mg in leaf tissues, whereas Troyer citrange restricted accumulation of Na in leaf tissues. Sour orange was more capable of accumulating Cu and Zn in leaf tissues, while other rootstocks had similar uptake of Cu. Karna Khatta, rough lemon and RLC-4 absorbed more Fe, while the foliar Mn content was highest on rough lemon rootstock. Troyer citrange appeared poor performer in terms of fruiting density and nutrient concentration. A positive significant correlation was found between leaf Ca concentration and canopy volume. Hence, considering growth performance, fruit quality and nutrient concentration, RLC-4, rough lemon and Karna Khatta rootstock could be suggested for lemon under alike ecological conditions.
In homogeneous isotropic turbulence, slender rods are known to align with the Lagrangian stretching direction. However, how the degree of alignment depends on the aspect ratio of the rod is not ...understood. Moreover, particle-laden flows are often anisotropic and inhomogeneous. Therefore we study the alignment of rods with the Lagrangian stretching direction in a channel flow, which is approximately homogeneous and isotropic near the centre but inhomogeneous and anisotropic near the walls. Our main question is how the distribution of relative angles between a rod and the Lagrangian stretching direction depends on the aspect ratio of the rod and upon the distance of the rod from the channel wall. We find that this distribution exhibits two regimes: a plateau at small angles corresponding to random uncorrelated motion, and power-law tails due to large excursions. We find that slender rods near the channel centre align better with the Lagrangian stretching direction compared with those near the channel wall. These observations are explained in terms of simple statistical models based on Jeffery's equation, qualitatively near the channel centre and quantitatively near the channel wall. Lastly we discuss the consequences of our results for the distribution of relative angles between the orientations of nearby rods (Zhao et al., Phys. Rev. Fluids, vol. 4, 2019, 054602).
A new whitefly species,
Pealius gallae
sp. nov.
forming pit galls on
Celtis philippensis
Blanco discovered in the Andaman Islands, is described and illustrated. Leaf pit galls were formed in the ...microhabitat of the puparia, each pit was observed with a single puparium, the opposite side of the galls was convex, easily recognizable by chlorotic spots; older galls turn brown and brittle. This is the first authentic record with illustrations of any leaf pit gall forming whitefly. The specialised gall inducing insects may pose extinction risks with limited host range. The new whitefly differs from
Pealius cinnamomi
David and Sundararaj in the habitus, gall forming nature, number of submarginal setae, vasiform orifice shape, broad tracheal folds and pattern of tubercles in it.
To investigate the physiological and metabolic attributes of arsenic (As) stress tolerance conferred by exogenous salicylic acid (SA), Glycine max L. (variety JS 335) seeds were aseptically ...germinated over filter paper moistened with SA (500 µM) and/or10 and 100 µM As (Sodium arsenite was used). On 2nd and 5th days of germination, the growing radicles were harvested, and analyzed for growth and different metabolic attributes. Findings exemplified that As significantly decreased germination percentage, radicle length, dry mass and activities of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX), while stimulated the contents of As, reactive oxygen species (ROS), lipoxygenase (LOX), guaiacol peroxidase (POD) and proline. Additionally, isozymes of antioxidants were also scrutinized over Native-PAGE gels and were found to be altered considerably under As-stress. However, exogenous SA remarkably enhanced germination percentage, growth indices, activities of SOD, CAT and APX, and proline accumulation along with reduced As, ROS and LOX, and restoring POD in As-stressed seedlings. In conclusion, SA confers As-stress tolerance to Glycine max L. by regulating the antioxidant enzymes and proline accumulation thereby reduced As content and ROS production. Further study is intended, particularly at gene level, to understand precise mechanism(s) involved in SA-mediated As-stress tolerance.
India is located at a critical geographic crossroads for understanding the dispersal of Homo sapiens out of Africa and into Asia and Oceania. Here we report evidence for long-term human occupation, ...spanning the last ~80 thousand years, at the site of Dhaba in the Middle Son River Valley of Central India. An unchanging stone tool industry is found at Dhaba spanning the Toba eruption of ~74 ka (i.e., the Youngest Toba Tuff, YTT) bracketed between ages of 79.6 ± 3.2 and 65.2 ± 3.1 ka, with the introduction of microlithic technology ~48 ka. The lithic industry from Dhaba strongly resembles stone tool assemblages from the African Middle Stone Age (MSA) and Arabia, and the earliest artefacts from Australia, suggesting that it is likely the product of Homo sapiens as they dispersed eastward out of Africa.
An invasive whitefly,
Paraleyrodes minei
Iaccarino is newly recorded from the Andaman and Nicobar Islands, India, and found infesting
Callophylum inophyllum
,
Morinda citrifolia
and
Psidium guajava
. ...The plant family Calophyllaceae is recorded as new host for
P. minei
. The puparial and adults identification characteristics and pest impact of
Paraleyrodes minei
in India are discussed. Biological information and natural enemies so far recorded are provided.
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•Soil physicochemical and biological properties were used for SQI development.•Major parameters studied were FDA, DHA, MBC, SOC, Av. NPK, AWC, MAS and SPR.•Highest SQI value of 0.90 ...was found in ZTDSR-ZTW at 0-10 cm soil depth.
Rice-wheat cropping system (RWCS) is the most important system occupying around 26 M ha spread over the Indo Gangetic Plains in South Asia and China. Many long-term trials were led to assess the agronomic productivity and economic profitability of various combinations of conservation agricultural (CA) practices (zero tillage, residue management and crop establishment) in RWCS of Eastern Indo-Gangetic Plains (EIGP) of India. The purpose of this study was to investigate the best management practices involving different tillage-based crop establishment and residue retention techniques and their contribution to agricultural system sustainability through improvement in soil health by developing soil quality index (SQI). We have used SQI as an instrument based on physical macro aggregate stability (MAS), available water capacity (AWC) and soil penetration resistance (SPR), chemical soil organic carbon (OC), available N, available P and available K and biological microbial biomass carbon (MBC), fluorescein diacetate (FDA) and dehydrogenase activity (DHA) properties of soil, because these are very useful indicators of soil’s functions for agronomic productivity and soil fertility. Soil properties like MAS, OC, MBC, FDA and DHA were higher by 47, 18, 56, 48 and 53%, respectively, under ZTDSR-ZTW (T7: Zero-till direct seeded rice - Zero-till wheat) than RPTR-CTW (T1: Random puddled transplanted rice - Conventional till broadcasted wheat), at 0-10 cm. CA based treatment T7 also recorded lower SPR (126 N cm-1). SQI for different treatments were calculated by performing principal component analysis based on the total data set method. The higher system rice equivalent yield of 12.41 t ha-1 was observed at SQI value of 0.90 at 0-10 cm and 0.86 at 10-20 cm in T7. It can be concluded that crop residue retention on the surface with zero tillage is beneficial for the sustainability and productivity of the RWCS in EIGP of India.
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