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1.
Artigo em Inglês | MEDLINE | ID: mdl-32125144

RESUMO

Lightweight, broad-band, and highly efficient microwave-absorbing materials (MAMs) with tunable electromagnetic properties are in high demand. However, the absorption properties are limited by the simple loss mechanism in commonly used absorbing materials. Here, we tested the microwave-absorbing properties of Fe-NiS2/NiS/poly(vinylidene fluoride) (PVDF) in the frequency range of 2-18 GHz. For the 2.5% Fe-NiS2/NiS/PVDF with the filling content of 20 wt %, the maximum reflection loss can reach -61.72 dB at 14.88 GHz, and the bandwidth can reach 3.8 GHz with the reflection loss value below -10 dB. Loss mechanisms of different composites were analyzed on the basis of their magnetic and dielectric properties using both experimental and computational methods. The results indicate that strong microwave absorption property is achieved through a balancing of dielectric loss and magnetic loss. These findings present a new strategy for the future design of MAMs.

2.
Ying Yong Sheng Tai Xue Bao ; 30(10): 3356-3366, 2019 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-31621221

RESUMO

To reveal the seedlings dynamics of dominant trees and their response to canopy changes (as indicated by changes in leaf area index), we analyzed the seedlings dynamics of dominant trees and canopy structure during forest regeneration based on three-year (2014 to 2016) censuses and hemispherical photography in a 4 hm2 forest dynamics monitoring plot. The results showed that canopy LAI first decreased and then increased during the survey period, with significant interannual difference. The seedlings of 12 dominant tree species showed notable response to the change of canopy structure, with the response varying among different tree species. The relative abundance or frequency of seedlings for neutral tree species generally increased with the decreases of canopy LAI. The relative abundance or frequency of seedlings of light-demanding tree species generally decreased with the increases of canopy LAI. In multi-response permutation procedures by analyzing the numeric composition and distribution of dominant tree seedlings, there was significant difference among the three censuses. Such interannual difference gradually decreased from 2014 to 2016. Significant change occurred in the indicator species of dominant tree seedlings, reflecting their responses to the changes of canopy structure.


Assuntos
Plântula , Árvores , China , Florestas , Folhas de Planta
3.
Angew Chem Int Ed Engl ; 58(28): 9464-9469, 2019 Jul 08.
Artigo em Inglês | MEDLINE | ID: mdl-31090132

RESUMO

The electrochemical N2 fixation, which is far from practical application in aqueous solution under ambient conditions, is extremely challenging and requires a rational design of electrocatalytic centers. We observed that bismuth (Bi) might be a promising candidate for this task because of its weak binding with H adatoms, which increases the selectivity and production rate. Furthermore, we successfully synthesized defect-rich Bi nanoplates as an efficient noble-metal-free N2 reduction electrocatalyst via a low-temperature plasma bombardment approach. When exclusively using 1 H NMR measurements with N2 gas as a quantitative testing method, the defect-rich Bi(110) nanoplates achieved a 15 NH3 production rate of 5.453 µg mgBi -1 h-1 and a Faradaic efficiency of 11.68 % at -0.6 V vs. RHE in aqueous solution at ambient conditions.

4.
Nat Chem ; 11(1): 64-70, 2019 01.
Artigo em Inglês | MEDLINE | ID: mdl-30420775

RESUMO

Rechargeable aprotic alkali metal (Li or Na)-O2 batteries are the subject of great interest because of their high theoretical specific energy. However, the growth of dendrites and cracks at the Li or Na anode, as well as their corrosive oxidation lead to poor cycling stability and safety issues. Understanding the mechanism and improving Li/Na-ion plating and stripping electrochemistry are therefore essential to realizing their technological potential. Here, we report how the use of a Li-Na alloy anode and an electrolyte additive realizes an aprotic bimetal Li-Na alloy-O2 battery with improved cycling stability. Electrochemical investigations show that stripping and plating of Li and Na and the robust and flexible passivation film formed in situ (by 1,3-dioxolane additive reacting with the Li-Na alloy) suppress dendrite and buffer alloy anode volume expansion and thus prevent cracking, avoiding electrolyte consumption and ensuring high electron transport efficiency and continued electrochemical reactions.

5.
J Colloid Interface Sci ; 537: 11-19, 2019 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-30414504

RESUMO

Exploring low-cost and outstanding bimetallic phosphides to substitute noble metals as electrocatalysts for oxygen evolution reaction (OER) in alkaline media is essential for renewable energy technologies. Herein, bimetallic nickel-iron phosphides nanoparticles (P-NiFe-800 NPs) with rich defects have been synthesized through gas annealing at 800 °C and phosphorization using uniform nickel-iron nanocubes (NiFe NCs) as precursor. At optimized calcination temperature, the obtained P-NiFe-800 NPs are composed of uniform nanoparticles with the rough surface, which suggests the larger surface area and more exposed rich active sites than other samples for OER. The introduction of P element to binary nickel-iron metals can optimize the crystalline and electronic structures of NiFe NCs and thus enhance electrocatalytic properties. Owing to the distinct morphological structure and synergistic effect between nickel-iron and phosphorus, P-NiFe-800 NPs demonstrate superior electrocatalytic activities for OER with lower overpotential of 270.1 mV to achieve a current density of 10 mA cm-2, smaller Tafel slope of 39 mV dec-1, lower electrochemical impedance spectroscopy (EIS) value, bigger determined double-layer capacitance (Cdl) of 2130 uF cm-2 and prominent stability than NiFe NCs, NiFe-600 NPs, NiFe-700 NPs, NiFe-800 NPs, NiFe-900 NPs, P-NiFe NCs, P-NiFe-600 NPs, P-NiFe-700 NPs and P-NiFe-900 NPs. The optimized phosphorization is helpful for fabricating the bimetallic phosphides as efficient catalysts for OER.

6.
J Am Chem Soc ; 139(50): 18178-18181, 2017 12 20.
Artigo em Inglês | MEDLINE | ID: mdl-29200280

RESUMO

Nanoscale inorganic wheel-shaped structures are one of the most striking types of molecular aggregations. Here, we report the synthesis of a gigantic lanthanide wheel cluster containing 140 Gd3+ atoms. As the largest lanthanide cluster reported thus far, {Gd140} features an attractive wheel-like structure with 10-fold symmetry. The nanoscopic molecular wheel possesses the largest diameter of 6.0 nm and displays high stability in solution, which allows direct visualization by scanning transmission electron microscopy. The newly discovered lanthanide {Gd140} cluster represents a new member of the molecular wheel family.

7.
Adv Mater ; 29(45)2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28833640

RESUMO

Sodium-ion batteries (SIBs) are considered as promising alternatives to lithium-ion batteries (LIBs) for large-scale electrical-energy-storage applications due to the wide availability and the low cost of Na resources. Along with the avenues of research on flexible LIBs, flexible SIBs are now being actively developed as one of the most promising power sources for the emerging field of flexible and wearable electronic devices. Here, the recent progress on flexible electrodes based on metal substrates, carbonaceous substrates (i.e., graphene, carbon cloth, and carbon nanofibers), and other materials, as well as their applications in flexible SIBs, are summarized. Also, some future research directions for constructing flexible SIBs are proposed, with the aim of providing inspiration to the further development of advanced flexible SIBs.

8.
Adv Mater ; 29(22)2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28370573

RESUMO

Developing nonprecious oxygen evolution electrocatalysts that can work well at large current densities is of primary importance in a viable water-splitting technology. Herein, a facile ultrafast (5 s) synthetic approach is reported that produces a novel, efficient, non-noble metal oxygen-evolution nano-electrocatalyst that is composed of amorphous Ni-Fe bimetallic hydroxide film-coated, nickel foam (NF)-supported, Ni3 S2 nanosheet arrays. The composite nanomaterial (denoted as Ni-Fe-OH@Ni3 S2 /NF) shows highly efficient electrocatalytic activity toward oxygen evolution reaction (OER) at large current densities, even in the order of 1000 mA cm-2 . Ni-Fe-OH@Ni3 S2 /NF also gives an excellent catalytic stability toward OER both in 1 m KOH solution and in 30 wt% KOH solution. Further experimental results indicate that the effective integration of high catalytic reactivity, high structural stability, and high electronic conductivity into a single material system makes Ni-Fe-OH@Ni3 S2 /NF a remarkable catalytic ability for OER at large current densities.

9.
Adv Mater ; 29(26)2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28436600

RESUMO

With the rising development of flexible and wearable electronics, corresponding flexible energy storage devices with high energy density are required to provide a sustainable energy supply. Theoretically, rechargeable flexible Li-O2 batteries can provide high specific energy density; however, there are only a few reports on the construction of flexible Li-O2 batteries. Conventional flexible Li-O2 batteries possess a loose battery structure, which prevents flexibility and stability. The low mechanical strength of the gas diffusion layer and anode also lead to a flexible Li-O2 battery with poor mechanical properties. All these attributes limit their practical applications. Herein, the authors develop an integrated flexible Li-O2 battery based on a high-fatigue-resistance anode and a novel flexible stretchable gas diffusion layer. Owing to the synergistic effect of the stable electrocatalytic activity and hierarchical 3D interconnected network structure of the free-standing cathode, the obtained flexible Li-O2 batteries exhibit superior electrochemical performance, including a high specific capacity, an excellent rate capability, and exceptional cycle stability. Furthermore, benefitting from the above advantages, the as-fabricated flexible batteries can realize excellent mechanical and electrochemical stability. Even after a thousand cycles of the bending process, the flexible Li-O2 battery can still possess a stable open-circuit voltage, a high specific capacity, and a durable cycle performance.

10.
Blood Press Monit ; 22(2): 101-104, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28177942

RESUMO

OBJECTIVE: To validate the G.LAB MD2200 automated wrist blood pressure (BP) monitors according to the European Society of Hypertension International Protocol (ESH-IP) revision 2010, the British Hypertension Society (BHS), and the International Organization for Standardization (ISO) 81060-2:2013 protocols. MATERIALS AND METHODS: The device was assessed on 33 participants according to the ESH requirements and was then tested on 85 participants according to the BHS and ISO 81060-2:2013 criteria. The validation procedures and data analysis followed the protocols precisely. RESULTS: The G.LAB MD2200 devices passed all parts of ESH-IP revision 2010 for both systolic and diastolic BP, with a device-observer difference of 2.15±5.51 and 1.51±5.16 mmHg, respectively. The device achieved A/A grading for the BHS protocol and it also fulfilled the criteria of ISO 81060-2:2013, with mean differences of systolic and diastolic BP between the device and the observer of 2.19±5.21 and 2.11±4.70 mmHg, respectively. CONCLUSION: The G.LAB MD2200 automated wrist BP monitor passed the ESH-IP revision 2010 and the ISO 81060-2:2013 protocol, and achieved the A/A grade of the BHS protocol, which can be recommended for self-measurement in the general population.


Assuntos
Determinação da Pressão Arterial/instrumentação , Determinação da Pressão Arterial/normas , Monitores de Pressão Arterial/normas , Pressão Sanguínea , Hipertensão/fisiopatologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Determinação da Pressão Arterial/métodos , Humanos , Pessoa de Meia-Idade , Sociedades Médicas , Reino Unido
11.
Adv Mater ; 29(13)2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28128868

RESUMO

Superefficient water-splitting materials comprising sub-nanometric copper clusters and quasi-amorphous cobalt sulfide supported on copper foam are reported. While working together at both the anode and cathode sides of an alkaline electrolyzer, this material gives a catalytic output of overall water splitting comparable with the Pt/C-IrO2 -coupled electrolyzer.

12.
Adv Mater ; 28(43): 9620-9628, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27634572

RESUMO

The "nonsticky" surface of a highly stable RuO2 /carbon nanotube cathode enhances the formation and decomposition of cathode surface-induced, solvation-mediated, micrometer-sized discharge products Li2 O2 in Li-O2 batteries and thus significantly improves the specific capacity, overpotentials, and cycle life. These findings contribute to a new understanding how the cathode surface controls Li-O2 electrochemistry.

13.
Adv Mater ; 28(38): 8413-8418, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27479932

RESUMO

A flexible and wearable lithium-oxygen (air) battery inspired by Chinese bamboo slips is constructed. In this novel battery, cathodes and anodes are woven without an air diffusion layer and any outer packaging; besides, the woven structure allows oxygen to access the cathodes from both sides freely, endowing the battery with a record energy density of over 523 W h kg-1 .

14.
Zhongguo Dang Dai Er Ke Za Zhi ; 18(6): 488-91, 2016 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-27324534

RESUMO

OBJECTIVE: To investigate the efficacy of heated humidified high-flow nasal cannula (HHHFNC) and nasal continuous positive airway pressure (nCPAP) in preterm infants aged 26-31(+6) weeks with respiratory distress syndrome after ventilator weaning. METHODS: A total of 161 preterm infants were randomly divided into two groups after ventilator weaning: HHHFNC treatment (n=79) and nCPAP treatment (n=82). The two groups were subdivided into 26-28(+6) weeks and 29-31+6 weeks groups according to the gestational age. The treatment failure rate, reintubation rate within 7 days after extubation, incidence of complications, and mortality during hospitalization were compared between the two groups. RESULTS: The treatment failure rate and reintubation rate showed no significant differences between the HHHFNC and nCPAP groups. The preterm infants aged 26-28(+6) weeks in the HHHFNC group had a significantly higher treatment failure rate than those in the nCPAP group (P<0.05), while the reintubation rate showed no significant difference. As for the preterm infants aged 29-31(+6) weeks, the treatment failure rate and reintubation rate showed no significant differences between the two groups. The incidence of complications and mortality showed no significant differences between the HHHFNC and nCPAP groups. CONCLUSIONS: In preterm infants aged 29-31(+6) weeks, HHHFNC has a similar efficacy as nCPAP after ventilator weaning, while in those aged less than 29 weeks, HHHFNC should be used with great caution if selected as the first-line noninvasive respiratory support.


Assuntos
Ventilação não Invasiva/métodos , Cateteres , Pressão Positiva Contínua nas Vias Aéreas/efeitos adversos , Feminino , Humanos , Recém-Nascido , Recém-Nascido Prematuro , Masculino , Ventilação não Invasiva/efeitos adversos , Desmame do Respirador
15.
Virus Genes ; 52(5): 606-12, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27251702

RESUMO

The objective of the present study was to evaluate the epidemiology of influenza A(H1N1)pdm09 and its hemagglutinin (HA) molecular and phylogenetic analysis during 2010-2014 in Dalian, North China. A total of 3717 influenza-like illness (ILI) cases were tested by real-time PCR and 493 were found to be positive. Out of these 493 cases, 121 were subtype influenza A(H1N1)pdm09, of which 14 cases were reported in 2010-2011, 29 in 2012-2013, and 78 in 2013-2014. HA coding regions of 45 isolates were compared to that of the vaccine strain A/California/7/09(H1N1), and a number of variations were detected. P83S, S185T, S203T, R223Q, and I321V mutations were observed in all of the Dalian isolates. Furthermore, a high proportion >71 % of the strains possessed the variation D97N and K283E. Phylogenetic analysis confirmed the close match of the majority of circulating strains with the vaccine strains. However, it also reveals a trend of strains to accumulate amino acid variations and form new phylogenetic groups.


Assuntos
Glicoproteínas de Hemaglutininação de Vírus da Influenza/genética , Vírus da Influenza A Subtipo H1N1/genética , Influenza Humana/epidemiologia , Influenza Humana/virologia , Aminoácidos/genética , China/epidemiologia , Evolução Molecular , Genótipo , Hemaglutininas/genética , Humanos , Epidemiologia Molecular/métodos , Mutação/genética , Filogenia , RNA Viral/genética , Análise de Sequência de DNA/métodos
16.
Angew Chem Int Ed Engl ; 55(14): 4532-6, 2016 Mar 24.
Artigo em Inglês | MEDLINE | ID: mdl-26923173

RESUMO

Monodisperse metal clusters provide a unique platform for investigating magnetic exchange within molecular magnets. Herein, the core-shell structure of the monodisperse molecule magnet of [Gd52 Ni56 (IDA)48 (OH)154 (H2 O)38 ]@SiO2 (1 a@SiO2 ) was prepared by encapsulating one high-nuclearity lanthanide-transition-metal compound of [Gd52 Ni56 (IDA)48 (OH)154 (H2 O)38 ]⋅(NO3 )18 ⋅164 H2 O (1) (IDA=iminodiacetate) into one silica nanosphere through a facile one-pot microemulsion method. 1 a@SiO2 was characterized using transmission electron microscopy, N2 adsorption-desorption isotherms, and inductively coupled plasma-atomic emission spectrometry. Magnetic investigation of 1 and 1 a revealed J1 =0.25 cm(-1) , J2 =-0.060 cm(-1) , J3 =-0.22 cm(-1) , J4 =-8.63 cm(-1) , g=1.95, and z J=-2.0×10(-3)  cm(-1) for 1, and J1 =0.26 cm(-1) , J2 =-0.065 cm(-1) , J3 =-0.23 cm(-1) , J4 =-8.40 cm(-1) g=1.99, and z J=0.000 cm(-1) for 1 a@SiO2 . The z J=0 in 1 a@SiO2 suggests that weak antiferromagnetic coupling between the compounds is shielded by silica nanospheres.

17.
Dalton Trans ; 43(30): 11579-86, 2014 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-24941105

RESUMO

A tripodal amide based ligand, tris-{(2-carbamoyl-5-carbomethoxy-pyridine)-2-ethyl}amine (H3L, 1), was synthesized and structurally characterized by single crystal X-ray diffraction. Investigation of the cation recognition behavior showed that the ligand has selective colorimetric sensing properties for cobalt(II) ions by an obvious color change from colorless to yellow. To investigate the sensing mechanism of H3L for Co(2+) ions, UV-vis absorption spectroscopy and single-crystal structural analysis were performed. The mixture of the ligand and cobalt(II) ions displayed selective colorimetric sensing properties for weak acid anions, such as CO3(2-), Ac(-), HCO3(-), SO3(2-), and PO4(3-). Detailed (1)H NMR experiments revealed that the basicity of the anions played an important role in the intensity of the interaction between the ligand and anions. The structures of compounds CoL (2), Co-Ac-HL (3), H4L-NO3 (4), and H4L-ClO4 (5) were also determined by single crystal diffraction studies.


Assuntos
Amidas/química , Cobalto/química , Colorimetria/instrumentação , Colorimetria/métodos , Ácidos , Cristalografia por Raios X , Ligantes , Espectroscopia de Ressonância Magnética , Sensibilidade e Especificidade , Espectrofotometria Ultravioleta
18.
PLoS One ; 7(1): e29242, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22272229

RESUMO

The increasing prevalence of insecticide resistance in Anopheles sinensis, a major vector of malaria in Jiangsu province in eastern China, threatens to compromise the successful use of insecticides in malaria control strategies. It is therefore vital to understand the insecticide resistance status of An. sinensis in the region. This study examined the nucleotide diversity of the para-sodium channel and knockdown resistance (kdr) in five field populations of adult An. sinensis mosquitoes collected in Jiangsu province, identifying the L1014F and L1014C substitutions for the first time. Competitive polymerase chain reaction (PCR) amplification of specific allele (cPASA) and polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) for resistance diagnosis were developed and validated. Comparing the results with direct sequencing revealed that the PCR-RFLP method was more sensitive and specific whereas the cPASA method was more convenient and suitable. The significant positive correlation between kdr allele frequency and bioassay-based resistance phenotype demonstrates that the frequency of L1014F and L1014C substitutions in the kdr gene provides a useful molecular marker for monitoring beta-cypermethrin resistance in natural populations of An. sinensis. Our results point to the L1014F substitution as the key mutation associated with beta-cypermethrin resistance. The high resistance and mutation frequency detected in the five populations also suggest cross-resistance with other pyrethroids may occur in An. sinensis, highlighting the need for further surveys to map insecticide resistance in China and the adoption of a rational management of insecticide application for resistance management and mosquito vector control.


Assuntos
Anopheles/genética , Proteínas de Insetos/genética , Resistência a Inseticidas/genética , Mutação , Piretrinas/farmacologia , Canais de Sódio/genética , Sequência de Aminoácidos , Substituição de Aminoácidos , Animais , Anopheles/classificação , Sequência de Bases , China , Frequência do Gene , Genótipo , Humanos , Insetos Vetores/efeitos dos fármacos , Insetos Vetores/genética , Inseticidas/farmacologia , Malária/parasitologia , Malária/prevenção & controle , Dados de Sequência Molecular , Controle de Mosquitos/métodos , Taxa de Mutação , Reação em Cadeia da Polimerase , Polimorfismo de Fragmento de Restrição , Homologia de Sequência de Aminoácidos , Homologia de Sequência do Ácido Nucleico , Especificidade da Espécie
19.
Int Immunopharmacol ; 12(2): 460-4, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22251871

RESUMO

Lactoferrin (LF) plays various anti-inflammatory roles in inflammation experimentally induced by lipopolysaccharides (LPS). But the protective effects of LF on LPS-induced acute lung injury (ALI) have not been elucidated. In this study, we aimed to study the effects of LF on ALI caused by LPS in mice. At 1h before or after LPS injection, an intraperitoneal injection of LF (5mg/body) was administered. Lung specimens and the bronchoalveolar lavage fluid (BALF) were isolated for histopathological examinations and biochemical analyses 12h after LPS exposure. We found that both prophylactic and therapeutic administration of LF significantly decreased the W/D ratio of the lung and protein concentration in the BALF. LF significantly reduced the pulmonary myeloperoxidase activity and the number of total cells in the BALF 12h after LPS challenge. LF treatment markedly attenuated lung edema, alveolar hemorrhage and inflammatory cells infiltration. Moreover, LF also decreased the production of TNF-α and increased interleukin-10 in the BALF. These results firstly indicate that LF may protect against LPS-induced ALI in mice.


Assuntos
Lesão Pulmonar Aguda/prevenção & controle , Lactoferrina/farmacologia , Lesão Pulmonar Aguda/tratamento farmacológico , Lesão Pulmonar Aguda/imunologia , Lesão Pulmonar Aguda/metabolismo , Animais , Anti-Inflamatórios/farmacologia , Líquido da Lavagem Broncoalveolar/imunologia , Hemorragia/tratamento farmacológico , Hemorragia/metabolismo , Interleucina-10/imunologia , Interleucina-10/metabolismo , Lipopolissacarídeos/imunologia , Pulmão/efeitos dos fármacos , Pulmão/imunologia , Pulmão/metabolismo , Pulmão/patologia , Masculino , Camundongos , Neutrófilos/efeitos dos fármacos , Neutrófilos/imunologia , Neutrófilos/metabolismo , Peroxidase/metabolismo , Edema Pulmonar/tratamento farmacológico , Edema Pulmonar/imunologia , Fator de Necrose Tumoral alfa/imunologia , Fator de Necrose Tumoral alfa/metabolismo
20.
Zhong Yao Cai ; 34(7): 1065-7, 2011 Jul.
Artigo em Chinês | MEDLINE | ID: mdl-22066401

RESUMO

OBJECTIVE: [corrected] To study the chemical constituents of essential oil from Ligustrum quihoui. METHODS: Essential oil was extracted by steam distillation (SD). The chemical constituents of essential oil was analyzed by GC-MS. RESULTS: The chemical components in the oil were qualitatively and quantitatively analyzed by GC-MS, 76 components were seperated and 35 components were identified. The main components are n-Hexadecanoic acid (17.28%), (Z, Z, Z)-9, 12, 15-Octadecatrienoic acid, ethyl ester (12.13%), Phytol (5.80%). CONCLUSION: The method is simple, reliable and with good reprodutivity.


Assuntos
Cromatografia Gasosa-Espectrometria de Massas/métodos , Ligustrum/química , Óleos Voláteis/química , Ácido Palmítico/análise , Plantas Medicinais/química , Ácidos Linolênicos/análise , Óleos Voláteis/isolamento & purificação , Fitol/análise , Folhas de Planta/química , Reprodutibilidade dos Testes , Vapor
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