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Population distribution and threats to sustainable management of selected non-timber forest products in tropical lowland rainforests of south western Nigeria

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Journal of forestry Research 2013年第1期24卷 75-82页

作者： Jimoh S.O. Amusa T.O. I.O. Azeez Department of forest Resources Management University of IbadanNigeria. Department of forest Resources Management University of IlorinNigeria.

Uncontrolled harvesting of non-timber forest products （NTFPs） poses a serious risk of extermination to several of these species in Nigeria. Yet, there is a paucity of information on the distribution, population status and sustainable management of NTFPs in most of the tropical lowland rainforests. We, therefore, assessed the population, distribution and threats to sustainable management of NTFPs within the tropical lowland rainforests of Omo and Shasha forest Reserves, south western Nigeria. Data were obtained through inventory surveys on five top priority species including： bush mango （Irvingia gabonensis （Aubry-Lecomte ex O’Rorke） Baill）, African walnut （Tetracarpidium conophorum （Mull. Arg.） Hutch. ＆ Dalziel syn. Plukenetia conophora）, chew-stick （Massularia acuminata （G. Don） Bullock）, fever bark （Annickia chlorantha Setten ＆ *** syn. Enantia chloranta） and bush pepper （Piper guineense Schumach. ＆ Thonn.）. Purposive and stratified random sampling techniques were used for the inventory. Each forest reserve was stratified into three, viz： less disturbed natural forest （for areas that have been rested for at least ten years）, recently disturbed natural forest （for areas that have suffered one form of human perturbation or the other in the last five years）, and plantation forest （for areas carrying forest plantation）. Data were collected from eighteen 10 m × 500 m belt transects located in the above strata. The species were generally fewer in both plantation and recently disturbed natural forest than the less disturbed natural forest, suggesting that forest disturbances （habitat modification） for other uses may have an effect on the occurrence and densities of the NTFPs. Exceptions to this trend were found for P. guineense and T. conophorum, which were fairly common in both plantation and recently disturbed natural forest. Among three tree NTFP species （i.e. I. gabonensis, M. acuminata and A. chlorantha）, only I. gabonensis showed a significant difference in ov

关键词： Tropical rainforest non-timber forest products (NTFP) population density distribution forest management

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Variability in physical properties of plantation-grown progenies of Melia composita and determination of a kiln-drying schedule

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Journal of forestry Research 2018年第5期29卷 1435-1442页

作者： Shailendra Kumar Bhushan U.Kelkar Ajit K.Mishra Susanta K.Jena forest products Division Forest Research Institute

Plantation-grown progenies of Melia composita *** studied for variability in several physical properties： density,radial and tangential shrinkage,longitudinal permeability of heartwood and ***,flat-sawn planks from each of the progeny were subjected to a quick-drying test for determination of kilndrying *** mean density of the species was 0.39 g cm^（-3） and the wood may be categorized as light *** radial shrinkage（%） for the species was 2.8% with progeny-wise variation in radial shrinkage from 1.56 to 4.11%.Mean tangential shrinkage（%） for the species was 5.54% with progeny-wise variation in tangential shrinkage from 3.69 to 7.71%.The resultant tangentialradial shrinkage ratio was 1.98（less than two）,which suggests that the wood is relatively stable with respect to drying *** sapwood and heartwood longitudinal permeability of the species were 3.38 and 2.02 Darcy,*** longitudinal permeability of sapwood and heartwood indicate better drying and preservative properties of the *** quick-drying test method suggests that the species is less susceptible to drying *** the test,only moderate checks and cracks were observed.A tentative kiln-drying schedule was recommended based on these results.

关键词： Melia composita Willd. Density Radial and tangential shrinkage Longitudinal permeability Quickdrying test Kiln-drying schedule

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Dative B–N bonds weaven toward two-dimensional purely organic materials for single crystals

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Science China Chemistry 2025年第1期68卷 12-14页

作者： Wei-Lei Zhou Siwei Wang Yong Chen College of Chemistry and Materials Science Inner Mongolia Key Laboratory of Chemistry for Nature Products and Synthesis for Functional Molecules Innovation Team of Optical Functional Molecular Devices Inner Mongolia Minzu University College of Chemistry Nankai University

Molecular topology is one of the important topics to study and understand the relationship between molecular structure and properties [1]. Particularly, two-dimensional (2D) materials with extremely high surface area and ultra-thin morphology have attracted considerable attention due to their unexpected properties in materials and chemistry [2,3].

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Inhibiting ceramide synthase 5 expression in microglia decreases neuroinflammation after spinal cord injury

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Neural Regeneration Research 2025年第10期20卷 2955-2968页

作者： Wei Zhang Yubao Lu Ruoqi Shen Yingjie Wu Chenrui Liu Xingxing Fang Liangming Zhang Bin Liu Limin Rong Department of Spine Surgery The Third Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina National Medical products Administration(NMPA)Key Laboratory for Quality Research and Evaluation of Cell products GuangzhouGuangdong ProvinceChina Guangdong Provincial Center for Quality Control of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina Guangdong Provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina

Microglia,the resident monocyte of the central nervous system,play a crucial role in the response to spinal cord ***,the precise mechanism remains *** investigate the molecular mechanisms by which microglia regulate the neuroinflammatory response to spinal cord injury,we performed single-cell RNA sequencing dataset analysis,focusing on changes in microglial *** found that the MG1 subpopulation emerged in the acute/subacute phase of spinal cord injury and expressed genes related to cell pyroptosis,sphingomyelin metabolism,and neuroinflammation at high ***,we established a mouse model of contusive injury and performed intrathecal injection of siRNA and molecular inhibitors to validate the role of ceramide synthase 5 in the neuroinflammatory responses and pyroptosis after spinal cord ***,we established a PC12-BV2 cell co-culture system and found that ceramide synthase 5 and pyroptosis-associated proteins were highly expressed to induce the apoptosis of neuron *** ceramide synthase 5 expression in a mouse model of spinal cord injury effectively reduced ***,ceramide synthase 5-induced pyroptosis was dependent on activation of the NLRP3 signaling *** ceramide synthase 5 expression in microglia in vivo reduced neuronal apoptosis and promoted recovery of neurological ***2g7 formed a“bridge”between sphingolipid metabolism and ceramide synthase 5-mediated cell death by inhibiting the NLRP3 signaling ***,these findings suggest that inhibiting ceramide synthase 5 expression in microglia after spinal cord injury effectively suppressed microglial pyroptosis mediated by NLRP3,thereby exerting neuroprotective effects.

关键词： ceramide synthase 5 gasdermin D microglia neuroinflammation NLRP3 nuclear factor kappa B Pla2g7 pyroptosis sphingomyelin metabolism spinal cord injury

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Surface defect and lattice engineering of Bi_(5)O_(7)Br ultrathin nanosheets for efficient photocatalysis

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Nano Research 2023年第1期16卷 248-255页

作者： Yunjing Wang Hongchen He Yunjiang Wang Meili Xie Feng Jing Xianhong Yin Feilong Hu Yan Mi Key Laboratory of Chemistry and Engineering of forest products State Ethnic Affairs CommissionGuangxi Key Laboratory of Chemistry and Engineering of Forest ProductsGuangxi Collaborative Innovation Center for Chemistry and Engineering of Forest ProductsGuangxi Minzu UniversityNanning 530006China

The effective separation and migration of photogenerated charge carriers in bulk and on the surface of photocatalysts will significantly promote photocatalytic ***,the synchronous regulation of photocharges on both counts is ***,the simultaneous separation of bulk and surface photocharges is conducted to enhance photocatalytic activity by coupling the surface defects and lattice engineering of bismuth *** depth-modulated Bi_(5)O_(7)Br ultrathin nanosheets with an abundance of bismuth in the crystal structure increased the internal electric field,which propelled the separation and migration of photocharges from bulk to the *** of oxygen vacancies(OVs)on the nanosheet surface forms local electric fields,which can stimulate the migration of charges to active sites on the catalyst ***,the OV-assembled Bi_(5)O_(7)Br nanosheets demonstrated enhanced photocatalytic degradation efficiency under simulated solar-light *** study proved the possibility of charge governing via electric field modulation based on an integrated strategy.

关键词： lattice engineering internal electric field oxygen vacancies photocharge separation bismuth oxybromide

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Vacuum press drying studies on two fast-growing Indian wood species

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Journal of forestry Research 2018年第3期29卷 857-862页

作者： Shailendra Kumar Rushikesh R.Topare Jitendra Nagar forest products Division Forest Research InstituteDehradun Uttarakhand 248006 India

Two fast-growing Indian species, Melia composita Benth. and Eucalyptus tereticornis Sm., which have different sets of physical properties, were dried together in a vacuum press dryer(VPD) under two drying conditions,i.e., above boiling point(ABP) and below boiling point(BBP). The ABP and BBP conditions were maintained by keeping the temperature constant at 75 ℃ and maintaining two pressure levels: 300 mm of Hg(ABP) and 450 mm of Hg(BBP). In order to understand pressure conditions at the core during vacuum drying, a cylindrical brass pipe was inserted in both wood cores and attached with pressure gauges placed outside of the VPD. The results indicate that the Melia wood core attained equilibrium pressure immediately with the pressure of VPD, while Eucalyptus attained it very slowly, reaching equilibrium at later stages of drying when cracks and checks advanced to the *** drying rate was higher for Melia than Eucalyptus under both drying conditions. The drying rate of Melia(ABP) was higher than Melia(BBP), however, the drying rate for Eucalyptus(ABP) was not significantly different from the BBP drying rate.

关键词： Vacuum press drying Melia composita Eucalyptus tereticornis Boiling point Wood core pressure

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Nanovilli electrode boosts hydrogen evolution:A surface with superaerophobicity and superhydrophilicity

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Nano Research 2021年第4期14卷 961-968页

作者： Yijun Yin Yan Tan Qiuyuan Wei Shucong Zhang Siqi Wu Qin Huang Feilong Hu Yan Mi Guangxi Key Laboratory of Chemistry and Engineering of forest products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest ProductsGuangxi University for NationalitiesNanning 530006China

Although tremendous efforts have been paid on electrocatalysts toward efficient electrochemical hydrogen generation,breakthrough is still highly needed in the design and synthesis of wonderful non-precious-metal ***,a nanovilli Ni2P electrode,which with superaerophobic and superhydropholic can significantly facilitate the mass and electron transfer was constructed via a facial morphology control ***,the substitution of sluggish oxygen evolution with urea oxidation,lowering the two-electrode cell voltage to only 1.48 volts to achieve a current density of 10 mA·cm^(-2).Thus,the as-constructed electrode achieves the operation of hydrogen generation by an AA *** work sheds new light on the exploration of other high-efficient electrocatalysts for hydrogen generation by using intermittent clean energy.

关键词： nanovilli array superaerophobic and superhydropholic AA-battery-driven hydrogen evolution urea oxidation

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Synthesis and Crystal Structure of a Degraded Dehydroabietylamine Thiophene Imine

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Chinese Journal of Structural Chemistry 2008年第7期27卷 884-887页

作者：饶小平宋湛谦伍勇贾卫红商士斌 Institute of Chemical Industry of forest products Chinese Academy of Forestry

A degraded dehydroabietylamine thiophene imine （C24H30NS, Mr = 364.55） has been synthesized from dehydroabietic acid, and its structure was characterized by IR, IH NMR spectroscopy and single-crystal X-ray diffraction. White crystals of the title compound crystallize in the monoclinic system, space group P21 with a = 5.9490（12）, b = 16.337（3）, c = 10.780（2）A, β = 92.21（3）°, V = 1046.9（3）A^3, Z = 2, Dc = 1.156 g/cm^3, λ= 0.71073A,μ = 0.162 mm^-1, F（000） = 394, the final R = 0.0443 and wR = 0.0805 for 1325 observed reflections with I 〉 2σ（I）. The imine group was directly attached to the chiral carbon atom of tricyclo hydrophenthenrane structure with a trans configuration. The dihedral angle between two aromatic rings is 88.3°.

关键词： degraded dehydroabietylamine thiophene imine synthesis crystal structure

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Spatiotemporal changes in antlerless proportion of culled Sika deer in relation to deer density

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Journal of forestry Research 2022年第3期33卷 1095-1101页

作者： Kei K.Suzuki Teruki Oka Masatoshi Yasuda Kyushu Research Center Forestry and Forest Products Research InstituteKumamoto860-0862Japan Shikoku Research Center Forestry and Forest Products Research InstituteKochi780-8077Japan

Population management of herbivores is widely applied to decrease damage to forests in the northern hemisphere. Culling more antlerless deer, including females and fawns, is an effective means of reducing the population and helps to improve management efficiency. To increase the efficiency of antlerless-biased culling, we assessed the spatiotemporal distribution of the antlerless ratio in culled sika deer (Cervus nippon) in relation to population density. We hypothesized that the antlerless ratio is higher at the center of the distribution than at the margins of the deer’s range, because dispersal processes differ according to sex and age: Young male deer first disperse into an unoccupied area, and then males may become established in the new area for approximately 10–15 years before the number of females increases. A statistical model revealed spatiotemporal changes in the antlerless ratio of culled sika deer. The change in the ratio basically fit the density distribution of the deer, which was estimated independently on the basis of fecal pellet count surveys. The antlerless ratio estimated from the model increased asymptotically as deer density rose. The results support our hypothesis and suggest that antlerless sika deer will be more easily culled at the center rather than at the margins of the distribution range. These findings should help to increase the efficiency of managing the deer via antlerless-biased culling.

关键词： Antlerless Culling Density Distribution Large herbivore Wildlife management

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Combining post-disturbance land cover and tree canopy cover from Landsat time series data for mapping deforestation,forest degradation,and recovery across Cambodia

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International Journal of Digital Earth 2022年第1期15卷 832-852页

作者： Katsuto Shimizu Tetsuji Ota Nariaki Onda Nobuya Mizoue Department of forest Management Forestry and Forest Products Research InstituteIbarakiJapan Faculty of Agriculture Kyushu UniversityFukuokaJapan Tohoku Research Center Forestry and Forest Products Research InstituteIwateJapan

Mapping of deforestation,forest degradation,and recovery is essential to characterize country-level forest change and formulate mitigation *** studies have mainly used a simple forest/non-forest classification after forest disturbance to identify deforestation and forest ***,a more flexible approach that is applicable to different forest conditions is *** this study,we examined an approach for mapping deforestation,forest degradation,and recovery using disturbance types and tree canopy cover estimates from annual Landsat time-series data from 1988 to 2020 across *** developed models to estimate both disturbance types and tree canopy cover based on a random forest algorithm using predictor variables derived from a trajectory-based temporal segmentation *** estimated disturbance types and canopy cover in each year were then used in a rule-based classification of deforestation,forest degradation,and *** producer’s and user’s accuracies ranged from 59.1%to 72.9%and 60.8%to 91.6%,respectively,for the forest change classes of mapping deforestation,forest degradation,and *** approach developed here can be adjusted for different definitions of deforestation,forest degradation,and recovery according to research objectives and thus has the potential to be applied to other study areas.

关键词： Deforestation degradation time series Google Earth Engine tropical forest

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